2-Butenoic acid, 2-methyl-, 8-(acetyloxy)-8a-[(acetyloxy)methyl]-5-[2-(2,5-dihydro-5-oxo-3-furanyl)-2-hydroxyethyl]octahydro-5,6-dimethylspiro[naphthalene-1(2H),2'-oxiran]-4-yl ester, (2E)- AIDS-132864 AIDS132864 Ajugamarin A 1 NSC627646