作者:Mongkol Buayairaksa、Somdej Kanokmedhakul、Kwanjai Kanokmedhakul、Panawan Moosophon、Chariya Hahnvajanawong、Kasem Soytong
DOI:10.1007/s12272-011-1205-x
日期:2011.12
Chemical investigation of fungal biomass of the fungus Syncephalastrum racemosum led to the isolation of new natural products (3R),(5S)-5-hydroxy-de-O-methyllasiodiplodin (1), 6-oxode-O-methyllasiodiplodin (2), in addition to five known compounds, de-O-methyllasiodiplodin (3), lasiodiplodin (4), (3R),(5R)-5-hydroxy-de-O-methyllasiodiplodin (5), ergosterol (6), and ergosterol peroxide (7). Their structures were elucidated by spectroscopic techniques. The absolute configuration of 1 was determined by a modified Mosher’s method. Compound 1 showed cytotoxicity against cholangiocarcinoma, KKU-M139, KKU-M156, and KKU-M213 cell lines with IC50 values in the range of 14–19 μg/mL, while 3 showed cytotoxicity against KB, BC1, and NCI-H187 cell lines with IC50 values of 12.67, 9.65, and 11.07 μg/mL, respectively.
通过对Syncephalastrum racemosum真菌生物量的化学研究,分离出新的天然产物(3R)、(5S)-5-羟基-去-O-甲基拉西奥二萜(1)、6-氧代-去-O-甲基拉西奥二萜(2),以及五种已知化合物:去-O-甲基拉西奥二萜(3)、拉西奥二萜(4)、(3R)、(5R)-5-羟基-去-O-甲基拉西奥二萜(5)、麦角甾醇(6)和过氧化麦角甾醇(7)。通过光谱技术阐明了这些化合物的结构。通过改良的Mosher方法确定了1的绝对构型。化合物1对胆管癌KKU-M139、KKU-M156和KKU-M213细胞系具有细胞毒性,IC50值在14-19微克/毫升之间,而化合物3对KB、BC1和NCI-H187细胞系具有细胞毒性,IC50值分别为12.67、9.65和11.07微克/毫升。