2-Propenoic acid, 2-methyl-, (3aS,4S,5S,6E,10Z,11aR)-5-ethoxy-6-formyl-2,3,3a,4,5,8,9,11a-octahydro-10-(hydroxymethyl)-3-methylene-2-oxocyclodeca[b]furan-4-yl ester
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