英文别名(rac)-Exatecan Intermediate 1; (±)-1H-Pyrano[3,4-f]indolizine-3,6,10(4H)-trione, 4-ethyl-7,8-dihydro-4-hydroxy; 4-Ethyl-7,8-dihydro-4-hydroxy-1H-pyrano[3,4-f]indolizine-3,6,10(4H)-trione; 4-ethyl-4-hydroxy-7,8-dihydro-1H-pyrano[3,4-f]indolizine-3,6,10-trione; (R,S)-8-Ethyl-8-hydroxy-2,3,5,8-tetrahydro-6-oxa-3-aza-cyclopenta[beta]naphthalene-1,4,7-trione; 4-ethyl-6-oxo-1,4,7,8-tetrahydro-4-hydroxy-pyrano[3,4-f]indolizine-3,10(6H)-dione; 4-ethyl-6-methyl-DBT; 4-ethyl-1,4,7,8-tetrahydro-4-hydroxypyrano[3,4-f]indolizine-3,6,10-trione; 7,8-dihydro-4-ethyl-4-hydroxy-1H-pyrano[3,4-f]indolizine-3,6,10(4H)-trione 
