10-Amino-4-ethyl-4-hydroxy-1H-pyrano[3',4':6,7]indolizino[1,2-b]quinoline-3,14(4H,12H)-dione 9-Amino-20(R)-camptothecin 9-Amino-20-(R,S)-camptothecin AIDS-160452 AIDS160452 NSC629971 NSC639173 {1H-Pyrano[3',4':6,7]indolizino[1,} 2-b\]quinoline-3,14(4H,12H)- dione, 10-amino-4-ethyl-4-hydroxy-, (R,S)-