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

5-allyloxy-3-bromo-7-(tert-butyldiphenylsilyloxy)-1,4-bis(methoxymethoxy)-2,6-dimethylnaphthalene