vaniprevir vaniprevir vaniprevir (mk-7009) is a macrocyclic hepatitis c virus (hcv) ns3/4a protease inhibitor, developed by merck & co., which is currently in clinical testing.in japan, it was approved for treating hepatitis c in 2014 under the brand name vanihep. vaniprevir names iupac name (1r,21s,24s)-21-tert-butyl-n-((1r,2r)-1--2-ethylcyclopropyl)-16,16-dimethyl-3,19,22-trioxo-2,18-dioxa-4,20,23-triazatetracyclo-heptacosa-6,8,10-triene-24-carboxamide identifiers cas number 923590-37-8 3d model (jsmol) interactive image chebi chebi:136047 chembl chembl599872 chemspider 24651717 drugbank db11929 echa infocard 100.207.830 ec number 682-506-7 kegg d09987 pubchem cid 24765256 unii cv3x74ao1h y inchi inchi=1s/c38h55n5o9s/c1-7-25-18-38(25,33(46)41-53(49,50)27-14-15-27)40-31(44)29-17-26-20-43(29)32(45)30(36(2,3)4)39-34(47)51-22-37(5,6)16-9-8-11-23-12-10-13-24-19-42(21-28(23)24)35(48)52-26/h10,12-13,25-27,29-30h,7-9,11,14-22h2,1-6h3,(h,39,47)(h,40,44)(h,41,46)/t25-,26-,29+,30-,38-/m1/s1key: kuqwglqllvflsm-onaxazcasa-n smiles cc(c)(c)1nc(=o)occ(c)(c)ccccc2cccc3cn(cc23)c(=o)o4c(n(c4)c1=o)c(=o)n5(c5c=c)c(=o)ns(=o)(=o)c6cc6 properties chemical formula c38h55n5o9s molar mass 757.94 g·mol−1 appearance white powder hazards ghs labelling: pictograms signal word warning hazard statements h373 precautionary statements p260, p314, p501 except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). infobox references