(4S)-9-Amino-4-ethyl-4-hydroxy-1H-pyrano(3',4':6,7)indolizino(1,2-b)quinoline-3,14(4H,12H)-dione 10-Aminocamptothecin 1H-Pyrano(3',4':6,7)indolizino(1,2-b)quinoline-3,14(4H,12H)-dione, 9-amino-4-ethyl-4-hydroxy-, (S)- 86639-63-6