Anti-tumor agents. 136. Cumingianosides A-F, potent antileukemic new triterpene glucosides, and cumindysosides A and B, trisnor- and tetranortriterpene glucosides with a 14,18-cycloapoeuphane-type skeleton from Dysoxylum cumingianum
摘要:
Six new triterpene glucosides, cumingianosides A-F (1-6) as well as a trisnor- and a tetranortriterpene glucoside, cumindysosides A (7) and B (8), respectively, with a 14,18-cycloapoeuphane-type skeleton have been isolated from Dysoxylum cumingianum as antileukemic principles. The structures were established on the basis of chemical and spectroscopic evidence. Among them, compounds 1 and 3 exhibited potent selective cytotoxicity against MOLT-4 human leukemia cell with ED50 of <0.006 25 and <0.0045 mug/mL, respectively.