ridazolol ridazolol ridazolol is a pharmaceutical drug acting as a beta adrenergic receptor antagonist. it was investigated in the 1980 and 90s for its effects on coronary heart disease and essential hypertension (high blood pressure). ridazolol names iupac name 5-chloro-4-amino]ethylamino]-1h-pyridazin-6-one identifiers cas number 83395-21-5 n 3d model (jsmol) interactive image chembl chembl1742443 chemspider 64393 pubchem cid 71265 unii 2r4qo1868y inchi inchi=1s/c15h18cl2n4o3/c16-11-3-1-2-4-13(11)24-9-10(22)7-18-5-6-19-12-8-20-21-15(23)14(12)17/h1-4,8,10,18,22h,5-7,9h2,(h2,19,21,23)key: uuwabvczfxkhsu-uhfffaoysa-ninchi=1/c15h18cl2n4o3/c16-11-3-1-2-4-13(11)24-9-10(22)7-18-5-6-19-12-8-20-21-15(23)14(12)17/h1-4,8,10,18,22h,5-7,9h2,(h2,19,21,23)key: uuwabvczfxkhsu-uhfffaoyal smiles c1=cc=c(c(=c1)occ(cnccnc2=c(c(=o)nn=c2)cl)o)cl properties chemical formula c15h18cl2n4o3 molar mass 373.23 g·mol−1 except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). infobox references it is not known to be marketed anywhere in the world.