2(1H)-Quinazolinone, 6-chloro-4-[(E)-2-cyclopropylethenyl]-3,4-dihydro-4-(trifluoromethyl)-, (4S)-, compd. with (4S)-6-Chloro-4-(cyclopropylethynyl)-1,4-dihydro-4-(trifluoromethyl)-2H-3,1-benzoxazin-2-one (1:1) AIDS-170526 AIDS170526