sb-243213 sb-243213 sb-243213 is a research chemical which acts as a selective inverse agonist for the 5ht2c receptor and has anxiolytic effects. it has better than 100x selectivity for 5-ht2c over all other receptor subtypes tested, and a longer duration of action compared to older 5-ht2c antagonist ligands. sb-243213identifiers iupac name 5-methyl-n-(6-pyridin-3-yl)-6-(trifluoromethyl)indoline-1-carboxamide cas number200940-23-4pubchem cid443391chemspider391620uniipa86jd65zjcomptox dashboard (epa)dtxsid0047323 chemical and physical dataformulac22h19f3n4o2molar mass428.415 g·mol−13d model (jsmol)interactive image smiles cc1=c(c(f)(f)f)c=c(n(c(nc2=cn=c(oc3=c(c)n=cc=c3)c=c2)=o)cc4)c4=c1 inchi inchi=1s/c22h19f3n4o2/c1-13-10-15-7-9-29(18(15)11-17(13)22(23,24)25)21(30)28-16-5-6-20(27-12-16)31-19-4-3-8-26-14(19)2/h3-6,8,10-12h,7,9h2,1-2h3,(h,28,30)key:zetbbvysbablhl-uhfffaoysa-n