Immunomodulatory Constituents from an Ascomycete, Microascus tardifaciens.
作者:Haruhiro FUJIMOTO、Toshiyuki FUJIMAKI、Emi OKUYAMA、Mikio YAMAZAKI
DOI:10.1248/cpb.47.1426
日期:——
Fractionation guided by the immunosuppressive activity of the defatted AcOEt extract of an Ascomycete, Microascus tardifaciens, afforded eight constituents, questin (emodin 8-O-methylether) (1), rubrocristin (2), 5,7-dihydroxy-4-methylphthalide (3), cladosporin (asperentin) (4), cladosporin 8-O-methylether (5), tradioxopiperazine A [cyclo-L-alanyl-5-isopentenyl-2-(1',1'-dimethylallyl)-L-tryptophan]
由子囊菌,脱脂的细小曲霉的脱脂AcOEt提取物的免疫抑制活性进行分级分离,可提供八种成分,即questin(大黄素8-O-甲基醚)(1),rubrocristin(2),5,7-二羟基-4-甲基邻苯二酚3),cladosporin(asperentin)(4),cladosporin 8-O-甲基醚(5),tratoxopiperazine A [环-L-丙氨酰基-5-异戊烯基-2-(1',1'-二甲基烯丙基)-L-色氨酸] (6),特拉索哌嗪B [环-L-丙氨酰基-7-异戊烯基-2-(1',1'-二甲基烯丙基)-L-色氨酸](7)和曲霉黄素(8),其中6和7为新化合物。化合物1和2显示出相当高的免疫抑制活性,化合物6显示中度,而3、4、5、7和8显示出低活性。