[(3S,4E)-4-[2-[(1S,2S,4aS,5R,6R,8aR)-6-hydroxy-5-(hydroxymethyl)-5,8a-dimethylspiro[3,4,4a,6,7,8-hexahydro-1H-naphthalene-2,2'-oxirane]-1-yl]ethylidene]-5-oxooxolan-3-yl] (E)-3-phenylprop-2-enoate