esproquin esproquin esproquin is an α2-adrenergic receptor agonist derived from tetrahydroisoquinoline. it has a positive inotropic effect, suggesting potential use in treatment of chronic heart failure. esproquinclinical dataother namesesproquinelegal statuslegal status investigational identifiers iupac name 2-(3-ethylsulfinylpropyl)-3,4-dihydro-1h-isoquinoline cas number37517-33-2pubchem cid31951unii3jyk9xfm9kchemical and physical dataformulac14h21nosmolar mass251.39 g·mol−13d model (jsmol)interactive image smiles o=s(cc)cccn1cc=2c=cc=cc2cc1