methyl 7-((2R,4S)-2-(tert-butyl)-4-ethyl-5-oxo-1,3-dioxolan-4-yl)-2-methoxy-9-oxo-9,11-dihydroindolizino[1,2-b]quinoline-8-carboxylate

10-氨基喜树碱

4-ethyl-8-methoxy-6-(trimethylsilyl)-1H-pyrano[3,4-c]pyridine

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

(S)-1-((R)-2,2-dimethyl-1,3-dioxolan-4-yl)-1-ethyl-4-methoxyfuro[3,4-c]pyridin-3(1H)-one