4-乙基-7,8-二氢-4-羟基-1H-吡喃并[3,4-f]吲嗪-3,6,10(4H)-三酮

4-乙基-4-羟基-3,4,12,14-四氢-1H-吡喃并[3'4':6,7]吲哚嗪并[1,2-b]喹啉-3,14-二酮

喜树碱

7-乙基-10-羟基喜树碱中间体

(4'S)-4'-ethyl-1',4',7',8'-tetrahydro-4'-hydroxy-3'H,10'H-spiro[1,3-dioxolane-2,6'-pyrano[3,4-f]indolizine]-3',10'-dione