脱水穿心莲内酯琥珀酸半酯         

Butanedioicacid,1-[[(1R,2R,4aR,5R,8aS)-2-(3-carboxy-1-oxopropoxy)-5-[(1E)-2-(2,5-dihydro-2-oxo-3-furanyl)ethenyl]decahydro-1,4a-dimethyl-6-methylene-1-naphthalenyl]methyl]ester