pafenolol pafenolol pafenolol is a beta adrenergic receptor antagonist. pafenolol names iupac name 1-phenyl]ethyl]-3-propan-2-ylurea identifiers cas number 80015-07-2 3d model (jsmol) interactive image chemspider 64289 pubchem cid 71144 inchi inchi=1s/c18h31n3o3/c1-13(2)20-11-16(22)12-24-17-7-5-15(6-8-17)9-10-19-18(23)21-14(3)4/h5-8,13-14,16,20,22h,9-12h2,1-4h3,(h2,19,21,23)inchi=1/c18h31n3o3/c1-13(2)20-11-16(22)12-24-17-7-5-15(6-8-17)9-10-19-18(23)21-14(3)4/h5-8,13-14,16,20,22h,9-12h2,1-4h3,(h2,19,21,23)key: pkwzwsxsckvujb-uhfffaoyaj smiles cc(c)ncc(coc1=cc=c(c=c1)ccnc(=o)nc(c)c)o properties chemical formula c18h31n3o3 molar mass 337.464 g·mol−1 except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). infobox references