4-(2-Methoxycarbonylamino-3-methyl-butyryl)-3-{4-[4-(4-{2-[1-(2-methoxycarbonylamino-3-methyl-butyryl)-pyrrolidin-2-yl]-3H-imidazol-4-yl}-phenylethynyl)-phenyl]-1H-imidazol-2-yl}-piperazine-1-carboxylic acid methyl ester