1H-Cyclopenta[7,8]cyclopropa[4,4a]naphtho[2,3-b]furan-10b(2H)-propanoic acid, 4-[(1R,4E)-1,5-dimethyl-6-oxo-4-hexenyl]dodecahydro-3a,6a-dimethyl-10-methylene-9-oxo-, methyl ester, (1aS,3aR,4R,6aS,6bS,7aR,10aR,10bR)- AIDS-195700 AIDS195700 Coronalolide methyl ester