8-allyloxy-6-hydroxy-1,4-bis(methoxymethoxy)-3,7-dimethylnaphthalene-2-carboxylic acid β-trimethylsilylethyl ester

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