Synonyms: Butanoicacid, 3-methyl-,6-(acetyloxy)-4a,5,6,7a-tetrahydro-4-[(3-methyl-1-oxobutoxy)methyl]spiro[cyclopenta[c]pyran-7(1H),2'-oxiran]-1-ylester, [1S-(1a,4aa,6a,7b,7aa)]-;Spiro[cyclopenta[c]pyran-7(1H),2'-oxirane], butanoic acid deriv.; Didrovaltrate;Didrovaltratum; Dihydroisovalepotriate; Dihydroisovaltrate;Dihydroisovaltratum; NSC 335756