heptabarb heptabarb heptabarb (inn; eudan, medapan, medomin, noctyn), also known as heptabarbitone (ban) or heptabarbital, is a sedative and hypnotic drug of the barbiturate family. it was used in europe for the treatment of insomnia from the 1950s onwards, but has since been discontinued. heptabarbclinical dataother namesg-475routes ofadministrationoralatc coden05ca11 (who) legal statuslegal status ca: schedule iv pharmacokinetic databioavailability83%metabolismhepaticelimination half-life6.1-11.2 hoursexcretionrenalidentifiers iupac name 5-cyclohept-1-en-1-yl-5-ethylpyrimidine-2,4,6(1h,3h,5h)-trione cas number509-86-4pubchem cid10518drugbankdb01354 ychemspider10081 yuniiv10r70ml23keggc17725 ychemblchembl468837 ycomptox dashboard (epa)dtxsid10198927 echa infocard100.007.371 chemical and physical dataformulac13h18n2o3molar mass250.298 g·mol−13d model (jsmol)interactive image smiles o=c1nc(=o)nc(=o)c1(/c2=c/ccccc2)cc inchi inchi=1s/c13h18n2o3/c1-2-13(9-7-5-3-4-6-8-9)10(16)14-12(18)15-11(13)17/h7h,2-6,8h2,1h3,(h2,14,15,16,17,18) ykey:pazqydjglkscsi-uhfffaoysa-n y (verify)