Nonanoic acid, 3-hydroxy-5-[(4-methoxyphenyl)methoxy]-2,4,6,8-tetramethyl-9-oxo-, (1R,2R,3E)-1-ethyl-4-iodo-2-methyl-3-buten-1-yl ester, (2R,3S,4S,5S,6S,8R)-