(4S)-6-chloro-4-[2-(2-chlorocyclopropyl)ethynyl]-4-(trifluoromethyl)-1H-3,1-benzoxazin-2-one Chloro Efavirenz\n(Mixture of Diastereomers) Chloro Efavirenz (Mixture of Diastereomers) (4S)-6-Chloro-4-[(2-chlorocyclopropyl)ethynyl]-1,4-dihydro-4-(trifluoroMethyl)-2H-3,1-benzoxazin-2-one 2H-3,1-Benzoxazin-2-one, 6-chloro-4-[2-(2-chlorocyclopropyl)ethynyl]-1,4-dihydro-4-(trifluoromethyl)-, (4S)- Chloro Efavirenz