Synonyms: {1H-Pyrano[3,} {4:6,7]indolizino[1,2-b]quinoline-3,14(4H,12H)-dione-,} 4-ethyl-4-hydroxy-10-methoxy-, (S)-;Camptothecin, 9-methoxy-;9-Methoxycamptothecine;CAMPTOTHECIN,9-METHOXY;4-Ethyl-4-hydroxy-10-methoxy-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-hydroxy-10-methoxy-, (S)-;1H-Pyrano[3, 4:6,7]indolizino[1,2-b]quinoline-3,14 (4H,12H)-dione-, 4-ethyl-4-hydroxy-10-methoxy-, (S)-;