2-{3-[5-(tert-Butyl-dimethyl-silanyloxymethyl)-3H-imidazol-4-yl]-3-methyl-but-1-ynyl}-3-methoxycarbonylmethyl-indole-1-carboxylic acid tert-butyl ester

2-[(Z)-3-(5-Formyl-3H-imidazol-4-yl)-3-methyl-but-1-enyl]-3-methoxycarbonylmethyl-indole-1-carboxylic acid tert-butyl ester