encainide encainide encainide (trade name enkaid) is a class ic antiarrhythmic agent. it is no longer used because of its frequent proarrhythmic side effects. encainideclinical datatrade namesenkaidahfs/drugs.commicromedex detailed consumer informationmedlineplusa605040atc codec01bc08 (who) legal statuslegal status withdrawn identifiers iupac name 4-methoxy-n-benzamide cas number66778-36-7 ypubchem cid48041drugbankdb01228 ychemspider43697 yuniisy3j0147nbkeggd07894 ychebichebi:4788 ychemblchembl315838 ncomptox dashboard (epa)dtxsid0022983 chemical and physical dataformulac22h28n2o2molar mass352.478 g·mol−13d model (jsmol)interactive image smiles coc1ccc(c(=o)nc2ccccc2ccc2ccccn2c)cc1 inchi inchi=1s/c22h28n2o2/c1-24-16-6-5-8-19(24)13-10-17-7-3-4-9-21(17)23-22(25)18-11-14-20(26-2)15-12-18/h3-4,7,9,11-12,14-15,19h,5-6,8,10,13,16h2,1-2h3,(h,23,25) ykey:pjwpndmdclxcom-uhfffaoysa-n y ny (what is this?) (verify) synthesis synthesis:<