(4R,5S,10R,11S)-(2E,8E)-11-hydroxy-4,10-bis[(2-methoxyethoxy)methoxy]-5-methyl-6-oxa-1,7-dioxo-2,8-dodecadienoic acid tert-butyl ester

(4R,5S)-(E)-5-(t-butyl(dimethyl)silyloxy)-4-(β-methoxyethoxy)methoxy-2-hexenoic acid