Lenta BN, Weniger B, Antheaume C, Noungoue DT, Ngouela S, Assob JCN, Vonthron-Sénécheau C, Fokou PA, Devkota KP, Tsamo E, Sewald N. Anthraquinones from the stem bark of Stereospermum zenkeri with antimicrobial activity.
PHYTOCHEMISTRY 2007;
68:1595-9. [PMID:
17499823 DOI:
10.1016/j.phytochem.2007.03.037]
[Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2006] [Revised: 03/22/2007] [Accepted: 03/29/2007] [Indexed: 05/15/2023]
Abstract
Two anthraquinones, zenkequinones A and B were isolated from the stem bark of Stereospermum zenkeri together with known sterequinone-F, p-coumaric acid, sitosterol-3-O-beta-D-glucopyranoside and 3beta-hydroxyolean-12-en-28-O-beta-D-glucopyranoside. Their structures were established by spectroscopic methods. The antimicrobial activity of the isolated compounds was evaluated against six multiresistant strains of pathogens. Zenkequinone B showed the best antibacterial activity (MIC 9.50 microg/ml) against gram-negative Pseudomonas aeruginosa.
Collapse