7-ethyl-10-[4-(1-piperidino)-1-piperidino]carbonyloxycamptothecin
(+)-(4S)-4,11-diethyl-4-hydroxy-9-[(4-piperidino-piperidino)carbonyloxy]-1H-pyrano[3',4':6,7]indolizino[1,2-b]quinol-3,14,(4H,12H)-dione