19685-10-0 4-Ethyl-4-hydroxy-9-methoxy-1H-pyrano[3',4':6,7]indolizino[1,2-b]quinoline-3,14(4H,12H)-dione AIDS-126461 AIDS126461 CAMPTOTHECIN,10-METHOXY Camptothecin, methoxy- Camptothecine, 10-methoxy- Methoxycamptothecin NSC111533 {1H-Pyrano[3',4':6,} {7]indolizino[1,2-b]quinoline-3,14(4H,12H)-dione,} 4-ethyl-4-hydroxy-9-methoxy-, (S)-