(1R,8aS)-2-acetyloxy-5,5,8a-trimethyl-1,5,6,7,8,8a-hexahydro-naphthalene-1-carboxylic acid (-)-menthyl ester

(1S,8aR)-2-acetyloxy-5,5,8a-trimethyl-1,5,6,7,8,8a-hexahydro-naphthalene-1-carboxylic acid (-)-menthyl ester