Anthraquinones from the stem bark of Stereospermum zenkeri with antimicrobial activity

Lenta BN, Weniger B, Antheaume C, Noungoue DT, Ngouela S, Assob JCN, Vonthron-Senecheau C, Fokou PA, Devkota KP, Tsamo E, Sewald N (2007)
PHYTOCHEMISTRY 68(11): 1595-1599.

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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 3 beta-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 mu g/ml) against gram-negative Pseudomonas aeruginosa. (c) 2007 Elsevier Ltd. All rights reserved.
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Lenta BN, Weniger B, Antheaume C, et al. Anthraquinones from the stem bark of Stereospermum zenkeri with antimicrobial activity. PHYTOCHEMISTRY. 2007;68(11):1595-1599.
Lenta, B. N., Weniger, B., Antheaume, C., Noungoue, D. T., Ngouela, S., Assob, J. C. N., Vonthron-Senecheau, C., et al. (2007). Anthraquinones from the stem bark of Stereospermum zenkeri with antimicrobial activity. PHYTOCHEMISTRY, 68(11), 1595-1599.
Lenta, B. N., Weniger, B., Antheaume, C., Noungoue, D. T., Ngouela, S., Assob, J. C. N., Vonthron-Senecheau, C., Fokou, P. A., Devkota, K. P., Tsamo, E., et al. (2007). Anthraquinones from the stem bark of Stereospermum zenkeri with antimicrobial activity. PHYTOCHEMISTRY 68, 1595-1599.
Lenta, B.N., et al., 2007. Anthraquinones from the stem bark of Stereospermum zenkeri with antimicrobial activity. PHYTOCHEMISTRY, 68(11), p 1595-1599.
B.N. Lenta, et al., “Anthraquinones from the stem bark of Stereospermum zenkeri with antimicrobial activity”, PHYTOCHEMISTRY, vol. 68, 2007, pp. 1595-1599.
Lenta, B.N., Weniger, B., Antheaume, C., Noungoue, D.T., Ngouela, S., Assob, J.C.N., Vonthron-Senecheau, C., Fokou, P.A., Devkota, K.P., Tsamo, E., Sewald, N.: Anthraquinones from the stem bark of Stereospermum zenkeri with antimicrobial activity. PHYTOCHEMISTRY. 68, 1595-1599 (2007).
Lenta, Bruno N., Weniger, Bernard, Antheaume, Cyril, Noungoue, Diderot T., Ngouela, Silvere, Assob, Jules C. N., Vonthron-Senecheau, Catherine, Fokou, Patrice A., Devkota, Krishna P., Tsamo, Etienne, and Sewald, Norbert. “Anthraquinones from the stem bark of Stereospermum zenkeri with antimicrobial activity”. PHYTOCHEMISTRY 68.11 (2007): 1595-1599.
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