camptothecin 20-(2-bromo)-n-butyrate

(4S)-4-乙基-4-羟基-1H-吡喃并[3,4-c]吡啶-3,8(4h,7h)-二酮

N-甲基哌嗪

(S)-4-Ethyl-4-hydroxy-6-iodo-3-oxo-7-(4-chloro-2-butynyl)-1H-pyrano[3,4-c]-8-pyridone

(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