Synonyms: Butanoicacid,(1S,3R,5R,6aS,7S,8S,9R,10R,10aS)-10-(acetyloxy)-3,5,6,6a,7,8,9,10-octahydro-5,9-dihydroxy-7,8-dimethyl-7-[(2Z)-3-methyl-2,4-pentadienyl]-1H-naphtho[1,8a-c]furan-1,3-diylester (9CI); Butanoic acid, 10-(acetyloxy)-3,5,6,6a,7,8,9,10-octahydro-5,9-dihydroxy-7,8-dimethyl-7-(3-methyl-2,4-pentadienyl)-1H-naphtho[1,8a-c]furan-1,3-diylester, [1S-[1a,3a,5a,6aa,7a(Z),8a,9b,10a,10aR*]]-;1H-Naphtho[1,8a-c]furan, butanoic acid deriv.; Casearin M