camptothecin
camptothecin
4-Ethyl-7,8-dihydro-4-hydroxy-1H-pyrano[3,4-f]indolizine-3,6,10(4H)-trione
(S)-α-ethyl-α-hydroxy-1,1-(ethylenedioxy)-6-hydroxymethyl-5-oxo-1,2,3,5-tetrahydroindolizine-7-
20-deoxyamino-7-ethyl-10-methoxycamptothecin