作者:Ly Dieu Ha、Poul Erik Hansen、Ole Vang、Fritz Duus、Hung Dinh Pham、Lien-Hoa Dieu Nguyen
DOI:10.1248/cpb.57.830
日期:——
Two new geranylated xanthones, 6-O-methylcowanin (4) and oliverixanthone (5), along with five known compounds, cowanin, rubraxanthone, cowaxanthone, cowanol, and β-mangostin, have been isolated from the bark of Garcinia oliveri. For comparison of their biological activities, one mono- and seven di-O-alkylated α-mangostin derivatives were synthesized from α-mangostin. The structures of all compounds were assigned by spectroscopic methods (1D and 2D NMR and MS). Cytotoxicity of selected xanthones against MCF-7 and DLD-1 cell lines was examined. Evaluation of the structure–activity relationship showed that α-mangostin had the strongest activity, and all the O-alkylated α-mangostin derivatives showed reduced activity compared to the naturally occurring α-mangostin.
从橄榄果树(Garcinia oliveri)的树皮中分离出了两种新的香豆素类化合物,6-O-甲基牛蒡素(4)和橄榄香豆素(5),以及五种已知化合物:牛蒡素、红香豆素、牛香豆素、牛醇和β-山竹果素。为了比较它们的生物活性,从α-山竹果素合成了一种单-O-烷基化和七种二-O-烷基化的α-山竹果素衍生物。所有化合物的结构通过光谱学方法(1D和2D NMR及质谱)进行了确定。对选定香豆素在MCF-7和DLD-1细胞系中的细胞毒性进行了检测。结构-活性关系的评估显示,α-山竹果素具有最强的活性,而所有O-烷基化的α-山竹果素衍生物的活性均较天然存在的α-山竹果素有所降低。