{(4S,5R)-4,5-Bis-(4-chloro-phenyl)-2-[2-ethoxy-4-(pyrrolidine-1-sulfonyl)-phenyl]-4,5-dimethyl-4,5-dihydro-imidazol-1-yl}-[4-(3-methanesulfonyl-propyl)-piperazin-1-yl]-methanone