5-Pyrimidinecarboxylic acid, 4-(2-chloro-4-fluorophenyl)-2-(3,5-difluoro-2-pyridinyl)-1,4-dihydro-6-[(1R,5R)-3-oxa-8-azabicyclo[3.2.1]oct-8-ylmethyl]-, methyl ester, (4R)- AIDS-180669 AIDS180669