Antituberculosis activity of natural and semisynthetic azorellane and mulinane diterpenoids
摘要:
The antituberculosis activity of 14 natural azorellane and mulinane diterpenoids isolated from Azorella compacta, Azorella madreporica, Mulinum crassifolium, and Laretia acaulis, together with eight semisynthetic derivatives, was evaluated against two Mycobacterium tuberculosis strains. The natural azorellanes azorellanol (3) and 17-acetoxy-13-alpha-hydroxyazorellane (6), and the semisynthetic mulinanes 13-hydroxy-mulin-11-en-20-oic-acid methyl ester (13) and mulinenic acid methyl ester (23), showed the strongest activity, with MIC values of 12.5 mu g/mL against both strains. The methylated derivatives 13-hydroxy-mulin-11-en-20-oic-acid methyl ester (13), mulin-11,13-dien-20-oic acid methyl ester (15) and mulinenic acid methyl ester (23) proved to be more active than the parent compounds. (C) 2009 Elsevier B.V. All rights reserved.
Antituberculosis activity of alkylated mulinane diterpenoids
作者:Gloria María Molina-Salinas、Jorge Bórquez、Salvador Said-Fernández、Luis Alberto Loyola、Alejandro Yam-Puc、Pola Becerril-Montes、Fabiola Escalante-Erosa、Luis Manuel Peña-Rodríguez
DOI:10.1016/j.fitote.2009.09.006
日期:2010.4
Natural azorellane and mulinane diterpenoids show antituberculosis activity, which is increased by methylation of their free carboxyl group. We have systematically investigated the effect of alkylation in this class of diterpenoids and found that the profile of bioactivity is relatively unaffected by the introduction of short alkyl groups, both linear and branched In this investigation. three semisynthetic diterpenoids, 13 hydroxy-mulin-11-en-20-oic acid n-propyl ester (3) and the n-propyl (19) and n-butyl (20) esters of isomulinic acid, showed the strongest antituberculosis activity (MIC = 6 25 mu g/mL) against a drug-resistant strain of Mycobacterium tuberculosis (C) 2009 Elsevier B V. All rights reserved