The relationship between the antibacterial activity and structure of 9-O,9′-O-demethyl (+)-virgatusin (Virg 3) was examined. The conversion of hydroxy groups on the 9 and 9′ positions to amino groups increased the activity. It was found that the 3′-methoxy group was more important for higher activity than the 4′-methoxy group on the 7′-phenyl group, and that the 3,4-methylenedioxy group on the 7-phenyl group was necessary for activity.
研究了9-O,9′-O-去甲基(+)维加图辛(Virg 3)的抗菌活性与结构之间的关系。9和9′位上的羟基转化为
氨基后,活性增强。研究发现,3′-甲氧基对提高活性比7′-苯基上的4′-甲氧基更重要,而7-苯基上的3,4-亚甲基二氧基对活性是必需的。