Efavirenz is 1,4-Dihydro-2H-3,1-benzoxazin-2-one substituted at the 4 position by cyclopropylethynyl and trifluoromethyl groups (S configuration) and at the 6 position by chlorine. A non-nucleoside reverse transcriptase inhibitor with activity against HIV, it is used with other antiretrovirals for combination therapy of HIV infection. It has a role as an antiviral drug and a HIV-1 reverse transcriptase inhibitor. It is an organochlorine compound, an organofluorine compound, a benzoxazine, a member of cyclopropanes and an acetylenic compound.
