(R)-2-{(1R,2S,3S,4R)-2-Formyl-4-methyl-3-[2-(2-methyl-[1,3]dithian-2-yl)-ethyl]-cyclohexyl}-propionic acid methyl ester

(R)-2-((1R,4S,4aR,7R,9aS)-4a-Dimethoxymethyl-7-methoxy-1,7-dimethyl-octahydro-5,6-dioxa-benzocyclohepten-4-yl)-propionic acid methyl ester