Lin SY, Ko HH, Lee SJ, Chang HS, Lin CH, Chen IS. Biological evaluation of secondary metabolites from the root of
Machilus obovatifolia.
Chem Biodivers 2015;
12:1057-67. [PMID:
26172326 DOI:
10.1002/cbdv.201400196]
[Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Indexed: 01/01/2023]
Abstract
Bioassay-guided fractionation of the root of Machilus obovatifolia led to the isolation of four new lignans, epihenricine B (1), threo-(7'R,8'R) and threo-(7'S,8'S)-methylmachilusol D (2 and 3), and isofragransol A (4), along with 23 known compounds. The compounds were obtained as isomeric mixtures (i.e., 2/3 and 4/20, resp.). The structures were elucidated by spectral analyses. Among the isolates, 1, licarin A (12), guaiacin (14), (±)-syringaresinol (21), and (-)-epicatechin (23) showed ABTS (=2,2'-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) cation radical-scavenging activity, with SC50 values of 11.7±0.5, 12.3±1.1, 11.0±0.1, 10.6±0.3, and 9.5±0.2 μM in 20 min, respectively. In addition, kachirachirol B (17) showed cytotoxicity against the NCI-H460 cell line with an IC50 value of 3.1 μg/ml.
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