5-Pyrimidinecarboxylic acid, 4-(2-chloro-4-fluorophenyl)-2-(3,5-difluoro-2-pyridinyl)-1,4-dihydro-6-[(1R)-8-oxa-3-azabicyclo[3.2.1]oct-3-ylmethyl]-, methyl ester, (4R)- AIDS-180670 AIDS180670