trimethylsilyl 2-(3-methoxy-4-trimethylsilyloxyphenyl)-2-trimethylsilyloxyacetate;trimethylsilyl 2-(3-methoxy-4-trimethylsilyloxy-phenyl)-2-trimethylsilyloxy-acetate;2-(3-methoxy-4-trimethylsilyloxyphenyl)-2-trimethylsilyloxyacetic acid trimethylsilyl ester;2-(3-methoxy-4-trimethylsilyloxy-phenyl)-2-trimethylsilyloxy-acetic acid trimethylsilyl ester;trimethylsilyl 2-(3-methoxy-4-trimethylsilyloxy-phenyl)-2-trimethylsilyloxy-ethanoate;Benzeneacetic acid, 3-methoxy-.alpha.,4-bis[(trimethylsilyl)oxy]-, trimethylsilyl ester;Vanillylmandelic acid, tris(trimethylsilyl)-
trimethylsilyl 2-(3-methoxy-4-trimethylsilyloxyphenyl)-2-trimethylsilyloxyacetate