dichloroisoprenaline dichloroisoprenaline dichloroisoprenaline (dci), also known as dichloroisoproterenol, was the first beta blocker ever to be developed. it is non-selective for the β1-adrenergic and β2-adrenergic receptors. dci has low potency and acts as a partial agonist/antagonist at these receptors. dichloroisoprenaline names preferred iupac name 1-(3,4-dichlorophenyl)-2-ethan-1-ol other names 1-(3,4-dichlorophenyl)-2-(isopropylamino)ethanoldichlorisoproterenol identifiers cas number 59-61-0 y 3d model (jsmol) interactive imageinteractive image chebi chebi:144234 n chembl chembl30816 y chemspider 5601 (1r) y5324297 (1s) y5601 () y kegg c11772 n mesh dichloroisoproterenol pubchem cid 5806 (1r)6951395 (1s)5806 () unii u7noe2k4m2 y comptox dashboard (epa) dtxsid20874225 inchi inchi=1s/c11h15cl2no/c1-7(2)14-6-11(15)8-3-4-9(12)10(13)5-8/h3-5,7,11,14-15h,6h2,1-2h3 ykey: vkmgswifehzqrs-uhfffaoysa-n yinchi=1/c11h15cl2no/c1-7(2)14-6-11(15)8-3-4-9(12)10(13)5-8/h3-5,7,11,14-15h,6h2,1-2h3key: vkmgswifehzqrs-uhfffaoyas smiles cc(c)ncc(o)c1=cc(cl)=c(cl)c=c1clc1ccc(cc1cl)c(o)cnc(c)c properties chemical formula c11h15cl2no molar mass 248.15 g/mol except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). n verify (what is yn ?) infobox references although dci was of no clinical value itself, further developments from dci eventually led to the development of the clinical candidate pronethalol (withdrawn due to carcinogenicity) and subsequently propranolol (the first clinically successful beta blocker). dichloroisoprenaline is a racemic mixture of enantiomers. the two enantiomers of dichloroisoprenaline