鸦胆亭 [鸦胆丁]，Bruceantin；≥98%

别名：Picras-3-en-21-oic acid, 15-((3,4-dimethyl-1-oxo-2-pentenyl)oxy)-13,20-epoxy-3,11,12-trihydroxy-2,16-dioxo-, methyl ester, (11beta,12alpha,15beta(E))- (9CI)

methyl (1R,2S,3R,6R,8R,13S,14R,15R,16S,17S)-3-[(E)-3,4-dimethylpent-2-enoyl]oxy-10,15,16-trihydroxy-9,13-dimethyl-4,11-dioxo-5,18-dioxapentacyclo[12.5.0.01,6.02,17.08,13]nonadec-9-ene-17-carboxylate