reposal reposal reposal is a barbiturate derivative invented in the 1960s in denmark. it has sedative, hypnotic and anticonvulsant properties, and was used primarily for the treatment of insomnia. reposalclinical dataother namesreposal, 5-ethyl-5-(bicyclo(3.2.1)octenyl)barbituric acidatc coden05ca12 (who) identifiers iupac name 5-bicyclooct-2-en-3-yl-5-ethylpyrimidine-2,4,6(1h,3h,5h)-trione cas number3625-25-0 npubchem cid19254chemspider10468690 yunii3t5tix1ayichemblchembl505851 ncomptox dashboard (epa)dtxsid50877567 chemical and physical dataformulac14h18n2o3molar mass262.309 g·mol−13d model (jsmol)interactive image smiles o=c1nc(=o)nc(=o)c1(cc)c=3c2c(cc2)c=3 inchi inchi=1s/c14h18n2o3/c1-2-14(11(17)15-13(19)16-12(14)18)10-6-8-3-4-9(5-8)7-10/h6,8-9h,2-5,7h2,1h3,(h2,15,16,17,18,19)/t8-,9+/m0/s1 ykey:mkelywovspvorm-dtwkunhwsa-n y ny (what is this?) (verify)