8-Allyloxy-5-bromo-6-hydroxy-1,4-bis-methoxymethoxy-3,7-dimethyl-naphthalene-2-carboxylic acid 2-trimethylsilanyl-ethyl ester

8-(allyloxy)-5-((4S,5S,6R,7R,8R,E)-5,7-diacetoxy-9-(allyloxy)-8-((4R,5R,6R)-6-((R,Z)-5-methoxy-5-oxopent-3-en-2-yl)-2,2,5-trimethyl-1,3-dioxan-4-yl)-2,4,6-trimethyl-9-oxonon-2-enoyl)-1,4,6-tris(methoxymethoxy)-3,7-dimethyl-2-naphthoic acid