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Wang Q, Gong H, Zhang Y, Peng Y, Chen H, Li M, Deng H, Hao J, Wan W. Visible-light mediated stereospecific C(sp 2)-H difluoroalkylation of ( Z)-aldoximes. Org Biomol Chem 2021; 19:7867-7874. [PMID: 34492676 DOI: 10.1039/d1ob01401c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A visible light mediated stereospecific C(sp2)-H difluoroalkylation of (Z)-aldoximes to (E)-difluoroalkylated ketoximes has been described. In this reaction, (hetero)-aromatic and aliphatic difluoroalkylated ketoximes could be obtained with the retention of the configuration of the starting aldoximes. A preliminary mechanism study showed that a difluoromethyl radical via an SET pathway was involved.
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Affiliation(s)
- Qian Wang
- Department of Chemistry, Shanghai University, Shanghai, China.
| | - Haiying Gong
- Department of Chemistry, Shanghai University, Shanghai, China.
| | - Yifang Zhang
- Department of Chemistry, Shanghai University, Shanghai, China.
| | - Yi Peng
- Department of Chemistry, Shanghai University, Shanghai, China.
| | - Hua Chen
- Department of Chemistry, Shanghai University, Shanghai, China.
| | - Mingjie Li
- Department of Chemistry, Shanghai University, Shanghai, China.
| | - Hongmei Deng
- Laboratory of Microstructures, Shanghai University, China
| | - Jian Hao
- Department of Chemistry, Shanghai University, Shanghai, China.
| | - Wen Wan
- Department of Chemistry, Shanghai University, Shanghai, China.
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Radulović NS, Tasić MM, Mladenović MZ. Oximes of 3,7-dimethylocta-2,6-dienal: Green synthesis, preparative separation of all diastereomers and complete assignment of 1H and 13C NMR spectra. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129427] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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3
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Setamdideh D, Khezri B, Esmaeilzadeh S. Synthesis of Oximes with NH2OH.HCl/DOWEX(R)50WX4 System. J CHIN CHEM SOC-TAIP 2012. [DOI: 10.1002/jccs.201200011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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4
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Regioselective Synthesis of Z-Aldoximes Catalyzed By H3PMo12O40under Solvent-Free Conditions. JOURNAL OF THE KOREAN CHEMICAL SOCIETY-DAEHAN HWAHAK HOE JEE 2008. [DOI: 10.5012/jkcs.2008.52.1.052] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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5
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Honda H, Tomizawa M, Casida JE. Insect muscarinic acetylcholine receptor: pharmacological and toxicological profiles of antagonists and agonists. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2007; 55:2276-81. [PMID: 17319687 DOI: 10.1021/jf0631934] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
The insect muscarinic acetylcholine receptor (mAChR) is evaluated as a potential target for insecticide action. The mammalian M2/M4-selective antagonist radioligand [3H]AF-DX 384 (a pirenzepine analogue) binds to Drosophila mAChR at a single high-affinity site identical to that for the nonselective antagonist [3H]quinuclidinyl benzilate (QNB) and with a pharmacological profile distinct from that of all mammalian mAChR subtypes. Three nonselective antagonists (QNB, scopolamine, and atropine) show the highest affinity (Ki=0.5-2.4 nM) at the Drosophila target, and AF-DX 384 and M3-selective 4-DAMP (dimethyl-4-(diphenylacetoxy)piperidinium iodide) rank next in potency (Ki=5-18 nM). Eleven muscarinic antagonists generally exhibit higher affinity than eight agonists. On injection into houseflies, the antagonists 4-DAMP and (S)-(+)-dimethindene produce suppressed movement, the agonist (methyloxadiazolyl)quinuclidine causes knockdown and tremors, and all of them inhibit [3H]QNB binding ex vivo, indicating possible mAChR-mediated intoxication. The insect mAChR warrants continuing study in lead generation to discover novel insecticides.
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Affiliation(s)
- Hideo Honda
- Environmental Chemistry and Toxicology Laboratory, Department of Environmental Science, Policy and Management, University of California, Berkeley, California 94720-3112, USA
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Eshghi H, Gordi Z. P2O5/SiO2 as an Efficient Reagent for the Preparation of Z -Aldoximes Under Solvent-Free Conditions. PHOSPHORUS SULFUR 2007. [DOI: 10.1080/10426500590924148] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Hossein Eshghi
- a Department of Chemistry, Sistan & Baluchestan University , Zahedan, Iran
- b Department of Chemistry, Ferdowsi University , Mashhad, Iran
| | - Zinat Gordi
- b Department of Chemistry, Ferdowsi University , Mashhad, Iran
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7
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Eshghi H, Hassankhani A. REGIOSELECTIVE SYNTHESIS OFE-OXIMES CATALYZED BY FERRIC CHLORIDE UNDER SOLVENT-FREE CONDITIONS. ORG PREP PROCED INT 2005. [DOI: 10.1080/00304940509354989] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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8
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Tecle H, Schwarz RD, Barrett SD, Callahan MJ, Caprathe BW, Davis RE, Doyle P, Emmerling M, Lauffer DJ, Mirzadegan T, Moreland DW, Lipiniski W, Nelson C, Raby C, Spencer C, Spiegel K, Thomas AJ, Jaen JC. CI-1017, a functionally M1-selective muscarinic agonist: design, synthesis, and preclinical pharmacology. PHARMACEUTICA ACTA HELVETIAE 2000; 74:141-8. [PMID: 10812951 DOI: 10.1016/s0031-6865(99)00027-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The five muscarinic receptor subtypes (M1-M5) are characterized by seven helices that define a transmembrane cavity which serves as the binding pocket for agonists and antagonists. The five cavities appear to be topographically different enough to permit subtype selectivity among antagonists but not among classical agonists which tend to be smaller in size than antagonists. It was reasoned that synthesis of muscarinic agonists longer/larger than their classical counterparts might result in subtype selectivity. M1 subtype selectivity was found in a class of 1-azabicyclo[2.2.1]heptan-3-one, O-(3-aryl-2-propynyl) oximes. One of these, CI-1017, improved spatial memory of hippocampally deficient mice and nbM-lesioned rats at doses of 1.0-3.2 and 0.1-0.3 mg/kg, respectively, while producing parasympathetic side effects only at very high doses (100-178 mg/kg). Additionally, CI-1017 inhibited production of amyloidogenic A beta and increased secretion of soluble APP. Thus, CI-1017, besides treating AD symptomatically, may also retard its progression. CI-1017 has recently completed phase I clinical trials.
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Affiliation(s)
- H Tecle
- Parke-Davis Pharmaceutical Research Division of Warner-Lambert, Ann Arbor, MI 48105, USA
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9
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Schwarz RD, Spencer CJ, Jaen JC, Mirzadegan T, Moreland D, Tecle H, Thomas AJ. Mutations of aspartate 103 in the Hm2 receptor and alterations in receptor binding properties of muscarinic agonists. Life Sci 1999; 56:923-9. [PMID: 10188794 DOI: 10.1016/0024-3205(95)00029-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Aspartate 103 (D103) in the third transmembrane domain of the Hm2 receptor was mutated to glutamate (D103E), asparagine (D103N), or alanine (D103A). As measured by [3H]-NMS, no significant binding was observed in D103A, while a 2-fold decrease in ligand affinity was seen in D103E and a 32-fold decrease in affinity was found in the D103N mutant. Examination of reference agonists showed greater loss of affinity in D103N than in D103E with the rank order of change being: L-607,207>carbachol>arecoline>pilocarpine>oxotremorine>McN-A-343. Of the novel 1-azabicyclo[2.2.1]-heptan-3-one oxime agonists examined, arylacetylene oximes showed little alteration in binding in either the D103E or D103N mutants, while the geometric isomers of several bicyclic aryl-ene-yne oximes showed significant changes in affinity, especially in the D103N mutant. Thus, overall size of the agonist and/or spatial orientation of the molecule within the binding pocket contribute to changes measured in binding.
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Affiliation(s)
- R D Schwarz
- Parke-Davis Pharmaceutical Research, Ann Arbor, MI 48105, USA
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Jaen J, Barrett S, Brann M, Callahan M, Davis R, Doyle P, Eubanks D, Lauffer D, Lauffer L, Lipinski W. In vitro and in vivo evaluation of the subtype-selective muscarinic agonist PD 151832. Life Sci 1999; 56:845-52. [PMID: 10188784 DOI: 10.1016/0024-3205(95)00019-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
PD 151832 is a potent partial muscarinic agonist that displays a high level of functional selectivity for the muscarinic m1 receptor subtype, as evidenced by its selective stimulation of PI turnover and cellular metabolic activity in transfected Hm1-CHO cells at concentrations that produce minimal stimulation of other cloned human muscarinic receptors. PD 151832 enhanced the amplification of Hm1-transfected NIH-3T3 cells at concentrations lower than those required to produce similar effects in Hm2 or Hm3-transfected cells. The functional m1 selectivity of PD 151832 is consistent with its improvement of mouse water maze performance at doses far lower than those required to produce peripheral parasympathetic side effects.
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Affiliation(s)
- J Jaen
- Department of Chemistry, Parke-Davis Pharmaceutical Research, Ann Arbor, Michigan 48105, USA
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11
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Wu ES, Kover A, Semus SF. Synthesis and modeling studies of a potent conformationally rigid muscarinic agonist: 1-azabicyclo[2.2.1]heptanespirofuranone. J Med Chem 1998; 41:4181-5. [PMID: 9784090 DOI: 10.1021/jm980192x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- E S Wu
- Department of Chemistry, Astra Arcus USA, P.O. Box 20890, Rochester, New York 14602, USA
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12
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Xu R, Sim MK, Go ML. Synthesis and pharmacological characterization of O-alkynyloximes of tropinone and N-methylpiperidinone as muscarinic agonists. J Med Chem 1998; 41:3220-31. [PMID: 9703467 DOI: 10.1021/jm9708588] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
A number of O-alkynyloximes of tropinone and N-methyl-4-piperidinone have been synthesized and evaluated for muscarinic activity. The affinities of these oximes were tested in homogenates of cerebral cortex, heart, and submandibulary glands from rats using [3H]pirenzepine and [3H]-N-methylscopolamine as radioligands. The oximes bind to the cortical muscarinic receptors with pKi values varying from 3 to 7. Higher binding affinities were observed for the O-alkynyl tropinone oximes than the corresponding piperidinone analogues. Binding to the muscarinic sites in the heart and submandibulary glands was also observed but with lower affinities. Good M1 subtype selectivity (10-fold or greater) was observed with some oximes (26a, 28a, 32a) at the cortical sites. These oximes also attenuated scopolamine-induced impairment of the water mask task in mice. Functional assays for M3 activity on the rat aorta showed that all oximes possessed M3 agonist action but M2 agonist activity was not observed at the endothelium-denuded rabbit aorta. Analysis of the quantitative structure-activity relationship (QSAR) indicated that the Connolly surface area is an important determinant of activity, accounting for 70% of the variation in cortical binding affinity among the oximes.
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MESH Headings
- Animals
- Aorta/drug effects
- Aorta/physiology
- Binding, Competitive
- Drug Design
- Escape Reaction/drug effects
- In Vitro Techniques
- Male
- Maze Learning/drug effects
- Mice
- Models, Molecular
- Molecular Structure
- Muscarinic Agonists/chemical synthesis
- Muscarinic Agonists/chemistry
- Muscarinic Agonists/pharmacology
- Muscle Contraction/drug effects
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/physiology
- N-Methylscopolamine/pharmacology
- Nuclear Magnetic Resonance, Biomolecular
- Piperidines/chemical synthesis
- Piperidines/chemistry
- Piperidines/pharmacology
- Pirenzepine/metabolism
- Rabbits
- Rats
- Rats, Sprague-Dawley
- Receptors, Muscarinic/drug effects
- Receptors, Muscarinic/physiology
- Structure-Activity Relationship
- Tropanes/chemical synthesis
- Tropanes/chemistry
- Tropanes/pharmacology
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Affiliation(s)
- R Xu
- Departments of Pharmacy and Pharmacology, National University of Singapore, 10 Kent Ridge Crescent, Republic of Singapore 119260
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Tecle H, Barrett SD, Lauffer DJ, Augelli-Szafran C, Brann MR, Callahan MJ, Caprathe BW, Davis RE, Doyle PD, Eubanks D, Lipiniski W, Mirzadegan T, Moos WH, Moreland DW, Nelson CB, Pavia MR, Raby C, Schwarz RD, Spencer CJ, Thomas AJ, Jaen JC. Design and synthesis of m1-selective muscarinic agonists: (R)-(-)-(Z)-1-Azabicyclo[2.2.1]heptan-3-one, O-(3-(3'-methoxyphenyl)-2-propynyl)oxime maleate (CI-1017), a functionally m1-selective muscarinic agonist. J Med Chem 1998; 41:2524-36. [PMID: 9651157 DOI: 10.1021/jm960683m] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The synthesis and SAR of a series of (Z)-(+/-)-1-azabicyclo[2.2. 1]heptan-3-one, O-(3-aryl-2-propynyl)oximes are described. The biochemistry and pharmacology of 24Z (PD 142505) and its enantiomers are highlighted. 24Z is functionally an m1-selective muscarinic agonist. Efficacy and m1 selectivity reside in the R enantiomer, (R)-24Z (CI-1017).
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Affiliation(s)
- H Tecle
- Parke-Davis Pharmaceutical Research, Division of Warner-Lambert Company, Ann Arbor, Michigan 48106-1047, USA
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14
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Messer WS, Abuh YF, Liu Y, Periyasamy S, Ngur DO, Edgar MA, El-Assadi AA, Sbeih S, Dunbar PG, Roknich S, Rho T, Fang Z, Ojo B, Zhang H, Huzl JJ, Nagy PI. Synthesis and biological characterization of 1,4,5,6-tetrahydropyrimidine and 2-amino-3,4,5,6-tetrahydropyridine derivatives as selective m1 agonists. J Med Chem 1997; 40:1230-46. [PMID: 9111297 DOI: 10.1021/jm960467d] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Previous studies identified several novel tetrahydropyrimidine derivatives exhibiting muscarinic agonist activity in rat brain. Such compounds might be useful in treating cognitive and memory deficits associated with low acetylcholine levels, as found in Alzheimer's disease. To determine the molecular features of ligands important for binding and activity at muscarinic receptor subtypes, the series of tetrahydropyrimidines was extended. Several active compounds were examined further for functional selectivity through biochemical studies of muscarinic receptor activity using receptor subtypes expressed in cell lines. Several amidine derivatives displayed high efficacy at m1 receptors and lower activity at m3 receptors coupled to phosphoinositide (PI) metabolism in A9 L cells. Four ligands, including 1b, 1f, 2b, and 7b, exhibited marked functional selectivity for m1 vs m3 receptors. Compound 1f also exhibited low activity at m2 receptors coupled to the inhibition of adenylyl cyclase in A9 L cells. Molecular modeling studies also were initiated to help understand the nature of the interaction of muscarinic agonists with the m1 receptor using a nine amino model of the m1 receptor. Several important interactions were identified, including interactions between the ester moiety and Thr192. Additional interactions were found for oxadiazoles and alkynyl derivatives with Asn382, suggesting that enhanced potency and selectivity may be achieved by maximizing interactions with Asp105, Thr192, and Asn382. Taken together, the data indicate that several amidine derivatives display functional selectivity for m1 muscarinic receptors, warranting further evaluation as therapeutic agents for the treatment of Alzheimer's disease. In addition, several amino acid residues were identified as potential binding sites for m1 agonists. These data may be useful in directing efforts to develop even more selective m1 agonists.
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Affiliation(s)
- W S Messer
- Department of Medicinal & Biological Chemistry, College of Pharmacy, The University of Toledo, Ohio 43606, USA
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Wu ES, Kover A, Loch JT, Rosenberg L, Semus SF, Verhoest PR, Gordon JC, Machulskis AC, McCreedy SA, Zongrone J, Blosser JC. Acylhydrazones as M1/M3 selective muscarinic agonists. Bioorg Med Chem Lett 1996. [DOI: 10.1016/0960-894x(96)00471-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Z-(±)-1-azabicyclo[2.2.1]heptan-3-one, O-(3-aryl-2-propynyl) oximes as potential m1-subtype selective muscarinic agonists. Bioorg Med Chem Lett 1995. [DOI: 10.1016/0960-894x(95)00086-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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17
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Tecle H, Lauffer D, Davis R, Mirzadegan T, Moreland D, Schwan R, Thomas A, Raby C, Eubanks D, Brann M, Jaen J. (±)-1-Azabicyclo[2.2.1]heptan-3-one, O-(3-methyl-5-aryl-2-penten-4-ynyl) oximes: Potent muscarinic agonists. Bioorg Med Chem Lett 1995. [DOI: 10.1016/0960-894x(95)00087-a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Chapter 3. Recent Advances in the Design and Characterization of Muscarinic Agonists and Antagonists. ANNUAL REPORTS IN MEDICINAL CHEMISTRY 1994. [DOI: 10.1016/s0065-7743(08)60716-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register]
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