brecanavir brecanavir brecanavir (inn; codenamed gw640385) is a protease inhibitor which has been studied for the treatment of hiv. brecanavirclinical dataatc codenoneidentifiers iupac name furan-3-yl] n-phenyl]butan-2-yl]carbamate cas number313682-08-5 npubchem cid5743186chemspider4675192 yuniie367i8c7fichemblchembl206031 ycomptox dashboard (epa)dtxsid10185296 chemical and physical dataformulac33h41n3o10s2molar mass703.82 g·mol−13d model (jsmol)interactive image smiles o=s(=o)(c2ccc1ococ1c2)n(cc(c)c)c(o)(nc(=o)o34cco4oc3)cc6ccc(occ5nc(sc5)c)cc6 inchi inchi=1s/c33h41n3o10s2/c1-20(2)14-36(48(39,40)25-8-9-29-30(13-25)45-19-44-29)15-28(37)27(35-33(38)46-31-17-43-32-26(31)10-11-41-32)12-22-4-6-24(7-5-22)42-16-23-18-47-21(3)34-23/h4-9,13,18,20,26-28,31-32,37h,10-12,14-17,19h2,1-3h3,(h,35,38)/t26-,27-,28+,31-,32+/m0/s1 ykey:jorvrjniljxmmg-olnqletpsa-n y ny (what is this?) (verify) in december 2006, its developer, glaxosmithkline discontinued further development because of insurmountable issues regarding formulation.