1-benzyl 3-methyl 2-(2,2-dimethoxyethylidene)malonate

(S)-4-ethyl-4-hydroxy-6-iodo-3-oxo-1H-pyrano[3,4-c]-8-pyridone

(S)-4-ethyl-4-hydroxy-6-iodo-8-methoxy-1,4-dihydro-pyrano[3,4-c]pyridin-3-one

9-硝基喜树碱

(4R,5bS,11aS)-4-ethyl-4-hydroxy-9-nitro-1,5b,6,11,11a,12-hexahydro-14H-pyrano[3',4':6,7]indolizino[1,2-b]quinoline-3,14(4H)-dione