Studies on chemical constituents of antitumor fraction from Periploca sepium BGE. I.
作者:HIDEJI ITOKAWA、JUNPING XU、KOICHI TAKEYA
DOI:10.1248/cpb.35.4524
日期:——
When the CHCl3 extract obtained by partitioning the methanolic extract of Periploca sepium between H2O and CHCl3 was subjected to column chromatography on silica gel, the antitumor activity against Sarcoma 180 ascites in mice was concentrated in the fraction eluted with CHCl3-MeOH (10 : 1). From the antitumor fraction, eight products, S-1-S-8, were isolated. S-1 was identified as 12β-hydroxypregna-4, 6, 16-triene-3, 20-dione (neridienone-A), obtained for the first time from Asclepiadaceous plants, by direct comparison with an authentic sample and the others were found to be steroidal glycosides. A new compound S-2A (named periplocogenin), and two known aglycones S-3A and S-5A, obtained by hydrolyzing the above glycosides with diluted acid, were respectively identified as 3β-O- (4', 6'-dideoxy-3'-O-methyl-Δ3'-D-2'-hexosulosyl) -Δ5-pregnene-17α, 20 (S) -diol, periplogenin, and Δ5-pregnene-3β, 20 (S) -diol from the proton and carbon-13 nuclear magnetic resonance spectral data. The structure of S-6A was identical with that of S-5A, and S-7A and S-8A were identical with S-2A.
将紫苏叶甲醇提取物在 H2O 和 CHCl3 之间分配得到的 CHCl3 提取物在硅胶上进行柱层析时,对小鼠肉瘤 180 腹水的抗肿瘤活性集中在 CHCl3-MeOH (10:1)洗脱的馏分中。从抗肿瘤馏分中分离出八种产物 S-1-S-8。通过与真品直接比较,S-1 被鉴定为 12β-羟基孕甾-4,6,16-三烯-3,20-二酮(neridienone-A),这是首次从升麻属植物中获得,其他化合物被鉴定为甾体苷。一种新化合物 S-2A(名为 periplocogenin)和两种已知的苷元 S-3A 和 S-5A 是用稀酸水解上述苷元得到的,它们分别被鉴定为 3β-O- (4'、6'-二脱氧-3'-O-甲基-Δ3'-D-2'-二十糖基)-Δ5-孕烯-17α,20(S)-二醇、periplogenin 和 Δ5-孕烯-3β,20(S)-二醇。S-6A 的结构与 S-5A 相同,S-7A 和 S-8A 与 S-2A 相同。