4-Ethyl-4-hydroxy-8,9-dimethoxy-1H-pyrano[3',4':6,7]indolizino[1,2-b]quinoline-3,14(4H,12H)-dione 8,9-Dimethoxycamptothecin AIDS-129099 AIDS129099 NSC328410 {1H-Pyrano[3',4':6,7]indolizino[1,} 2-b\]quinoline-3,14(4H,12H)- dione, 4-ethyl-4-hydroxy-8, 9-dimethoxy-, (+-)-