The chemical Efavirenz has a designated molecular formula of C14H9ClF3NO2 and a molecular weight of 315.676 g/mol. Synonyms may include: L 743726, (S)-6-Chloro-4-(cyclopropylethynyl)-1,4-dihydro-4-(trifluoromethyl)-2H-3,1-benzoxazin-2-one, (4S)-6-Chloro-4-(cyclopropylethynyl)-1,4-dihydro-4-(trifluoromethyl)-2H-3,1-benzoxazin-2-one, DMP 266, Sustiva, Stocrin, EFV, HSDB 7163, UNII-JE6H2O27P8, (S) (ChemID). Efavirenz has been assigned a MeSH pharmacological action of: Cytochrome P-450 CYP2B6 Inducer, Cytochrome P-450 CYP2C19 Inhibitor, Cytochrome P-450 CYP2C9 Inhibitor, Cytochrome P-450 CYP3A Inducer.