4,11-Diethyl-4,9-dihydroxy-1H-pyrano[3',4':6,7]indolizino[1,2-b]quinoline-3,14(4H,12H)-dione

9-Nitrocamptothecin

9-Nitrocamptothecin (Rubitecan)

rubetican

camptothecin, 9-nitro-20(s)-

9-nitro-cpt

9-nitrocamptothecin (rubitecan)

4α-ethyl-4-hydroxy-10-nitro-1h-pyrano[3',4':6,7]indolizino[1,2-b]quinoline-3,14(4h,12h)-dione

9-nitro-20(s)-camptothecine

(s)-4-ethyl-4-hydroxy-10-nitro-1h-pyrano[3',4':6,7]-indolizino[1,2-b]quinoline-3,14(4h,12h)-dione