Synonyms: 2-Butenoicacid, 2-methyl-,2-[8-(acetyloxy)-8a-[(acetyloxy)methyl]octahydro-5,6-dimethyl-4-(2-methyl-1-oxobutoxy)spiro[naphthalene-1(2H),2'-oxiran]-5-yl]-1-(2,5-dihydro-5-oxo-3-furanyl)ethylester, [1R-[1a,4b(S*),4ab,5b[S*(E)],6a,8a,8aa]]-; Spiro[naphthalene-1(2H),2'-oxirane], 2-butenoicacid deriv.; Ajugamarin H 1