acetic acid, 2-(((3-exo)-8-methyl-8-azabicyclo(3.2.1)oct-3-yl)thio)-, (3aS,4R,5S,6S,8R,9R,9aR,10R)-6-ethenyldecahydro-5-hydroxy-4,6,9,10-tetramethyl-1-oxo-3a,9-propano-3aH-cyclopentacycloocten-8-yl ester