N,N'-[[(2R,5R)-1-[3,5-Difluoro-4-[4-(4-fluorophenyl)-1-piperidinyl]phenyl]-2,5-pyrrolidinediyl]bis[(6-fluoro-1H-benzimidazole-5,2-diyl)-(2S)-2,1-pyrrolidinediyl[(1S)-1-[(1R)-1-methoxyethyl]-2-oxo-2,1-ethanediyl]]]biscarbamic acid C,C'-dimethyl ester