Phytoestrogenic activity of Aceriphyllum rossii and rapid identification of phytoestrogens by LC–NMR/MS and bioassay-guided isolation

Polyphenolics and triterpenoids from the whole herbs of Melastoma dodecandrum Lour. and their anti-inflammatory activity

Melastoma dodecandrum Lour. is a creeping shrub belonging to the Melastomataceae family. It has been widely used as a medicine and food in South China and is recognized as a safe and effective anti-inflammatory agent. 35 compounds (1-35) were isolated from the whole herbs of M. dodecandrum, including two undescribed polyphenolics (1 and 2), two undescribed triterpenoids (3 and 4), twenty-eight known polyphenolics (5-32) and three known triterpenoids (33-35). Based on chemical evidence and spectral data analysis (UV, Optical rotation data, 1D and 2D-NMR, and HR-ESI-MS), the structures of undescribed compounds were elucidated. Compounds 1-35 were tested for their inhibitory activity on NO production in LPS-induced RAW264.7 cells. Among them, compound 8 exhibited the most excellent inhibitory activity with IC50 value of 14.50 ± 4.69 μM.

Qualitative and Quantitative Analysis of the Major Ingredients of a Herbal Preparation, Ciwujia Injection by Combination of HPLC-Q-TOF-MS, HPLC-TQ-MS/MS and UPLC-PDA

Background:

Ciwujia injection, prepared from water extraction of Acanthopanax senticosus, is widely used for the treatment of cardiovascular diseases in the clinic in China. The ingredients of the preparation are still not efficiently clear and its quality control method requires further improvement. </P><P> Objective: In this paper, the qualitative and quantitative methods for quality control of Ciwujia injection were originally developed by a combination of HPLC-Q-TOF-MS, HPLC-TQ-MS/MS and UPLCPDA.

Methods:

With HPLC-Q-TOF-MS and HPLC-TQ-MS/MS, compounds were identified firstly by comparison of their MS spectra and retention times with those of standards or recorded information in the literature. Further, a new UPLC-PDA method was originally established to simultaneously determine the multiple ingredients in the preparations.

Results:

For qualitative analysis, 22 compounds were identified by the presented method. For quantitative analysis, the validated method exhibited good linearity (R2 > 0.998), repeatability (RSD < 1.50%), intra- and inter-day precisions (RSD < 8.33%) and recoveries (95.93-108.58%) for the simultaneous determination of the active ingredients, including protocatechuic acid-3-glucoside, l-phenylalanine, protocatechuic acid, neochlorogenic acid, chlorogenic acid, gentiopicroside, eleutheroside B, and cryptochlorogenic acid, and was successfully utilized to analyze the eight compounds in 4 batches of Ciwujia injection.

Conclusion:

The presented method is simple and rapid for quality control of Ciwujia injection, and could provide a useful reference for the quality control and routine analysis of others Ciwujia preparations.

Chemical constituents from the leaves of Melia azedarach

Six compounds, benzyl 3-O-β-D-glucopyranosyl-7-hydroxybenzoate (1), spathulenol (2), 1,7,8-trihydroxy-2-naphtaldehyde (3), quercetin (4), astragalin (5) and 2-methoxy-4-(2-propenyl)phenyl β-D-glucoside (6), were isolated from the leaves of Melia azedarach L. The structure elucidation of compound 1 was discussed in detail based on its 2D-NMR data. Compound 1 showed weak cytotoxicity against the cell lines of T-24, NCI-H460, HepG2, SMMC-7721, CNE, MDA-MB-231 and B16F10 with the inhibition rates from 10.01% to 34.05% at the concentration of 80 μM.