Two novel compounds, stachyflin and acetylstachyflin, have been isolated by solid-state fermentation of Stachybotrys sp. RF-7260. The structures of both metabolites, determined by detailed NMR analyses and X-ray crystallographic analysis, are novel with a pentacyclic moiety including cis-fused decalin. The absolute stereochemistry of stachyflins was determined by circular dichroism analysis. Stachyflin showed antiviral activity against influenza A virus (H1N1) in vitro with an IC50 value of 0.003μM. Acetylstachyflin was about 77-fold less active than stachyflin.
通过对RF-7260丝状酵母菌进行固态发酵,分离出两种新型化合物——丝状酵母菌素和乙酰丝状酵母菌素。通过详细的核磁共振分析和X射线晶体学分析,确定这两种代谢产物的结构是新颖的,具有包括顺式稠合
萘在内的五环部分。通过圆二色性分析确定了丝状酵母菌素的绝对立体
化学。丝状酵母菌素在体外对甲型流感病毒(H1N1)显示出抗病毒活性,IC50值为0.003μM。乙酰丝状酵母菌素的活性比丝状酵母菌素低约77倍。