3,10-Ethano-1H,8H-furo(3,4-d)(1)benzopyran-9-acetic acid, 8-acetyl-4-((3,4-dimethyl-1-oxo-2-pentenyl)oxy)octahydro-11,12-dihydroxy-3-(methoxycarbonyl)-9-methyl-5-oxo-, (3S-(3alpha,3aalpha,4alpha(E),6aalpha,8alpha,9beta,10alpha,10aS*,11S*,12R*))- 53663-07-3 Bruceanic acid A