Synonyms: (3S)-3,3aβ,4,5,5a,6,7,9,9aβ,9bα-Decahydro-3β,5aα,9β-trimethylnaphtho[1,2-b]furan-2,8-dione;(3S)-3,3aβ,4,5α,5a,6,7,9,9aβ,9bα-Decahydro-3β,5aα,9β-trimethylnaphtho[1,2-b]furan-2,8-dione;(3S,3aβ,9aβ,9bα)-Dodecahydro-3,5aα,9β-trimethylnaphtho[1,2-b]furan-2,8-dione