Efavirenz Systematic (IUPAC) name 8-chloro-5-(2-cyclopropylethynyl)- 5-(trifluoromethyl)- 4-oxa-2-azabicyclo [4.4.0]deca- 7,9,11-trien-3-one Identifiers CAS number 154598-52-4 ATC code J05AG03 PubChem 64139 DrugBank APRD00059 Chemical data Formula C14H9NClF3O2  Mol. weight 315.675 g/mol Pharmacokinetic data Bioavailability  ? Protein binding 99.5-99.75% Metabolism Hepatic (CYP3A4 and CYP2B6-mediated) Half life 40-55 hours Excretion Renal and f ...
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