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

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

6-bromo-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