gs-6620 gs-6620 gs-6620 is an antiviral drug which is a nucleotide analogue. it was developed for the treatment of hepatitis c but while it showed potent antiviral effects in early testing, it could not be successfully formulated into an oral dosage form due to low and variable absorption in the intestines which made blood levels unpredictable. it has however continued to be researched as a potential treatment for other viral diseases such as ebola virus disease. gs-6620clinical datatrade namesgs-6620legal statuslegal status us: investigational new drug identifiers iupac name triazin-7-yl)-5-cyano-4-hydroxy-4-methyl-2-amino]-phenoxyphosphoryl]oxymethyl]oxolan-3-yl] 2-methylpropanoate cas number1350735-70-4pubchem cid58059494chemspider31141332uniiwd5dug7x38chemblchembl3120792comptox dashboard (epa)dtxsid60159240chemical and physical dataformulac29h37n6o9pmolar mass644.6 g·mol−13d model (jsmol)interactive image smiles c(c(=o)oc(c)c)np(=o)(oc1(((o1)(c#n)c2=cc=c3n2n=cn=c3n)(c)o)oc(=o)c(c)c)oc4=cc=cc=c4 inchi inchi=1s/c29h37n6o9p/c1-17(2)26(36)42-24-22(43-29(15-30,28(24,6)38)23-13-12-21-25(31)32-16-33-35(21)23)14-40-45(39,44-20-10-8-7-9-11-20)34-19(5)27(37)41-18(3)4/h7-13,16-19,22,24,38h,14h2,1-6h3,(h,34,39)(h2,31,32,33)/t19-,22+,24+,28+,29-,45?/m0/s1key:yaaqyjcoifnmkx-cvanignksa-n