METHANESULFONIC ACID, 1,1,1-TRIFLUORO-, (4AS,5R,6S,8AS)-6-[[(1,1-DIMETHYLETHYL)DIMETHYLSILYL]OXY]-5-[[[(1,1-DIMETHYLETHYL)DIMETHYLSILYL]OXY]METHYL]-3,4,4A,5,6,7,8,8A-OCTAHYDRO-5,8A-DIMETHYL-1-NAPHTHALENYL ESTER