(4S)-4-Ethyl-4,10-dihydroxy-1H-pyrano(3',4':6,7)indolizino(1,2-b)quinoline-3,14(4H,12H)-dione 1H-Pyrano(3',4':6,7)indolizino(1,2-b)quinoline-3,14(4H,12H)-dione, 4-ethyl-4,10-dihydroxy-, (S)- 67656-30-8 9-Hydroxycamptothecin 9-Hydroxycamptothecine