5-Pyrimidinecarboxylic acid, 4-(2-chloro-4-fluorophenyl)-2-(3,5-difluoro-2-pyridinyl)-1,4-dihydro-6-[(9-methyl-6-oxa-2,9-diazaspiro[4.5]dec-2-yl)methyl]-, methyl ester, (4R)- AIDS-180667 AIDS180667