AIDS-107989 AIDS107989 Efavirenz & BCH-13520 {(2R,4R)-4-[2-amino-6-(cyclopropylamino)-9H-purin-9-yl]-1,3-dioxolan-2-yl}methanol & (4S)-6-chloro-4-(cyclopropylethynyl)-4-(trifluoromethyl)-1,4-dihydro-2H-3,1-benzoxazin-2-one