[(4S,5R)-2-(6-tert-Butyl-4-ethoxy-pyridin-3-yl)-4,5-bis-(4-chloro-phenyl)-4,5-dimethyl-4,5-dihydro-imidazol-1-yl]-(2,3,4,5-tetrahydro-benzo[b][1,4]diazepin-1-yl)-methanone