[12S,13E,(-)]-8α,12-Epoxylabda-13-ene-1β-ol

[2S,5aα,9bα,(-)]-Dodecahydro-3aβ,6,6,9aβ-tetramethyl-2β-[(E)-1-methyl-1-propenyl]naphtho[2,1-b]furan-9β-ol