brefonalol brefonalol brefonalol is a beta-adrenergic antagonist that reduces heart frequency and blood pressure and dilates blood vessels. it has been studied in around 1990, but is not known to be marketed as of 2021. brefonalol names iupac name 6-ethyl]-3,4-dihydro-1h-quinolin-2-one other names brefanolol identifiers cas number 104051-20-9 y 3d model (jsmol) interactive image chembl chembl1742432 chemspider 59289 pubchem cid 65880 unii dvo6ssg9s3 y comptox dashboard (epa) dtxsid20869414 inchi inchi=1s/c22h28n2o2/c1-22(2,13-12-16-6-4-3-5-7-16)23-15-20(25)18-8-10-19-17(14-18)9-11-21(26)24-19/h3-8,10,14,20,23,25h,9,11-13,15h2,1-2h3,(h,24,26)key: yyuzpbgibvjysi-uhfffaoysa-ninchi=1/c22h28n2o2/c1-22(2,13-12-16-6-4-3-5-7-16)23-15-20(25)18-8-10-19-17(14-18)9-11-21(26)24-19/h3-8,10,14,20,23,25h,9,11-13,15h2,1-2h3,(h,24,26)key: yyuzpbgibvjysi-uhfffaoyan smiles cc(c)(ccc1=cc=cc=c1)ncc(c2=cc3=c(c=c2)nc(=o)cc3)o properties chemical formula c22h28n2o2 molar mass 352.478 g·mol−1 except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). infobox references