Methanesulfonic acid (1R,3R,3aS,4S,4aR,8aS,9aR)-1-methoxy-3-methyl-dodecahydro-naphtho[2,3-c]furan-4-ylmethyl ester

(1R,3R,3aR,4S,4aR,8aS,9aR)-1-Methoxy-3-methyl-4-((phenylthio)methyl)dodecahydronaphtho[2,3-c]furan