2(1H)-Quinazolinone, 4-(cyclopropylethynyl)-5,6-difluoro-3,4-dihydro-4-(trifluoromethyl)-, (4S)-, compd. with 4-Amino-1-[(2R,5S)-2-(hydroxymethyl)-1,3-oxathiolan-5-yl]-2(1H)-pyrimidinone (1:1) AIDS-170519 AIDS170519