erb-196 erb-196 erb-196, also known as way-202196, is a synthetic nonsteroidal estrogen that acts as a highly selective agonist of the erβ. it possesses 78-fold selectivity for the erβ over the erα. the drug was under development by wyeth for the treatment of inflammation and sepsis starting in 2004 but development was discontinued by 2011. erb-196clinical dataother namesway-202196identifiers iupac name 3-(3-fluoro-4-hydroxyphenyl)-7-hydroxynaphthalene-1-carbonitrile cas number550997-55-2pubchem cid6102691drugbankdb06875chemspider4810213unii470cl5l4acchemblchembl192154comptox dashboard (epa)dtxsid70422018 chemical and physical dataformulac17h10fno2molar mass279.270 g·mol−13d model (jsmol)interactive image smiles c1(=cc2=c(c(=c1)c#n)c=c(c=c2)o)c1=cc(=c(c=c1)o)f inchi inchi=1s/c17h10fno2/c18-16-7-10(2-4-17(16)21)12-5-11-1-3-14(20)8-15(11)13(6-12)9-19/h1-8,20-21hkey:nssoshdcwcmndm-uhfffaoysa-n