7-(1-Hydroxy-2-propyl)camptothecin

7-propyl-20(S)-camptothecin

(S)-4-Ethyl-4-hydroxy-11-(4-hydroxy-butyl)-1,12-dihydro-4H-2-oxa-6,12a-diaza-dibenzo[b,h]fluorene-3,13-dione

(S)-4-Ethyl-4-hydroxy-11-(1-hydroxymethyl-propyl)-1,12-dihydro-4H-2-oxa-6,12a-diaza-dibenzo[b,h]fluorene-3,13-dione

(4S)-4-ethyl-4-hydroxy-11-(4-hydroxybutan-2-yl)-1H-pyrano[3',4':6,7]indolizino[1,2-b]quinoline-3,14(4H,12H)-dione