(2E,8Z)-(4R,5R,10S,11S,12R)-5,11-Bis-(4-methoxy-benzyloxy)-4,10,12-trimethyl-13-oxo-trideca-2,8-dienoic acid ethyl ester

(2E,8Z)-(4R,5R,10S)-5-(4-Methoxy-benzyloxy)-10-[(4S,5S)-2-(4-methoxy-phenyl)-5-methyl-[1,3]dioxan-4-yl]-4-methyl-undeca-2,8-dienoic acid ethyl ester