Antimicrobial indolequinones from the mid-intestinal gland of the muricid gastropod Drupella fragum
作者:Yoshiyasu Fukuyama、Chie Iwatsuki、Mitsuaki Kodama、Masamitsu Ochi、Kumi Kataoka、Kozo Shibata
DOI:10.1016/s0040-4020(98)00593-6
日期:1998.8
Three new indolequinones, 6-merhoxyindole-4,7-quinone (1), 5-methoxyindole-4,7-quinone (2) and 5-methylindole-4,7-quinone (3) were isolated from the mid-intestinal gland of the muricid gastropod Drupella fragum. The structures of 1 and 2 were established by spectroscopic methods and total synthesis, whereas the structure of 3 was elucidated mainly by NMR spectroscopic analyses. Compounds 1 3 exhibited moderate antimicrobial activities against Staphylococcus aureus, Bacillus subtilis, and Escherichia coli with MIC = 6.25 similar to 50 mu g/mL. (C) 1998 Elsevier Science Ltd. All rights reserved.