英文别名CHUGAI-01; Spiro[1,3-dioxolane-2,6'(3'H)-[1H]pyrano[3,4-f]indolizine]-3',10'(4'H)-dione, 4'-ethyl-7',8'-dihydro-4'-hydroxy-, (4'S)-; (S)-4′-ethyl-4′-hydroxy-7′,8′-dihydrospiro[[1,3]dioxolane-2,6′-pyrano[3,4-f]indolizine]-3′,10′(1′H,4′H)-dione; Camptothecin Impurity 8; (S)-4'-Ethyl-4'-hydroxy-7',8'-dihydrospiro[[1,3]dioxolane-2,6'-pyrano[3,4-f]indolizine]-3',10'(1'H,4'H)-dione; (S)-4-Ethyl-4-hydroxy-1,4,7,8-tetrahydro-3H,10H-spiro[pyrano[3,4-f]indolizine-6,2'-[1,3]dioxolane]-3,10-dione; (4′S)-4′-Ethyl-7′,8′-dihydro-4′-hydroxyspiro[1,3-dioxolane-2,6′(3′H)-[1H]pyrano[3,4-f]indolizine]-3′,10′(4′H)-dione; (4S)-4-ethyl-6,6-(ethylenedioxy)-7,8-dihydro-4-hydroxy-1H-pyrano[3,4-f]indolizine-3,10(4H)-dione; (S)-4-Ethyl-6,6-(ethylenedioxy)-7,8-dihydro-4-hydroxy-1H-pyrano[3,4-f]indolizine-3,10(4H)-dione; (S)-4-ethyl-6,6-(ethylenedioxy)-7,8-dihydro-4-hydroxy-1H-pyrano[3,4-f]indolizine-3,10(4H)dione; (S)-4-ethyl-6,6-(ethylenedioxy)-7,8-dihydro-1H-pyrano[3,4-f]indolizine-3,10(4H)-dione; (S)-4-ethyl-6,6-(ethylenedioxy)-1,4,7,8-tetrahydro-4-hydroxypyrano[3,4-f]indolizine-3,10(6H)-dione 
