20R-Camptothecin

(R)-Camptothecin

(R)-(-)-Camptothecin

(R)-(-)-Camptothecine

(R)-4-Ethyl-4-hydroxy-1H-pyrano[3’,4’:6,7]indolizino[1,2-b]quinoline-3,14(4H,12H)-dione

(4R)-4β-Ethyl-4-hydroxy-1H-pyrano[3',4':6,7]indolizino[1,2-b]quinoline-3,14(4H,12H)-dione