2-Propenoic acid,3-phenyl-,esters,(3R,5S,- 5aR,6R,7S,9R,9aS)-6-(acetyloxy)octahydro-2,2,- 5a,9-tetramethyl-2H-3,9a-methano-1- benzoxepin-5,7-diyl ester,(2E,2'E)-