rel-2-[4-[[(4R,5S)-4,5-Bis(4-chlorophenyl)-2-[4-tert-butyl-2-ethoxyphenyl]-4,5-dihydro-4,5-dimethyl-1H-imidazol-1-yl]carbonyl]-1-piperazinyl]-1-(4-morpholinyl)ethanone