vesnarinone vesnarinone vesnarinone (inn) is a cardiotonic agent. a mixed phosphodiesterase 3 inhibitor and ion-channel modifier that has modest, dose-dependent, positive inotropic activity, but minimal negative chronotropic activity. vesnarinone improves ventricular performance most in patients with the worst degree of heart failure. vesnarinoneclinical dataahfs/drugs.cominternational drug namesroutes ofadministrationby mouthatc codenonelegal statuslegal status in general: ℞ (prescription only) identifiers iupac name 6--3,4-dihydro-1h-quinolin-2-one cas number81840-15-5 ypubchem cid5663chemspider5461 nunii5cow40ev8mchemblchembl17423 ncomptox dashboard (epa)dtxsid80231411 chemical and physical dataformulac22h25n3o4molar mass395.459 g·mol−13d model (jsmol)interactive image smiles coc1=c(c=c(c=c1)c(=o)n2ccn(cc2)c3=cc4=c(c=c3)nc(=o)cc4)oc inchi inchi=1s/c22h25n3o4/c1-28-19-7-3-16(14-20(19)29-2)22(27)25-11-9-24(10-12-25)17-5-6-18-15(13-17)4-8-21(26)23-18/h3,5-7,13-14h,4,8-12h2,1-2h3,(h,23,26) nkey:zvnyjizdirkmbf-uhfffaoysa-n n ny (what is this?) (verify)