Synonyms: 2(5H)-Furanone,4-[2-[8-(acetyloxy)-8a-[(acetyloxy)methyl]octahydro-4-hydroxy-5,6-dimethylspiro[naphthalene-1(2H),2'-oxiran]-5-yl]-1-hydroxyethyl]-,[1R-[1a,4b,4ab,5b(S*),6a,8a,8aa]]-;Spiro[naphthalene-1(2H),2'-oxirane], 2(5H)-furanone deriv.; Ajugamarin C 1