英文别名6-chloro-4-[2-(2-methylcyclopropyl)ethynyl]-4-(trifluoromethyl)-1H-3,1-benzoxazin-2-one; Methyl Efavirenz (Mixture of Diastereomers); 6-Chloro-1,4-dihydro-4-[2-(2-methylcyclopropyl)ethynyl]-4-(trifluoromethyl)-2H-3,1-benzoxazin-2-one; SV 997; rac Methyl Efavirenz (Mixture of Diastereomers); Efavirenz Methyl Impurity; 2H-3,1-Benzoxazin-2-one, 6-chloro-1,4-dihydro-4-[2-(2-methylcyclopropyl)ethynyl]-4-(trifluoromethyl)-, (4S)-; Methyl Efavirenz 
