narcobarbital narcobarbital narcobarbital (pronarcon) is a barbiturate derivative developed in 1932 by carl heinrich friedrich boedecker and heinrich gruber schoneberg, assignors to the firm j. d. riedel-e. de haën ag, berlin, germany. later, in 1937, may, was patented in united states. it is an n-methylated derivative of propallylonal and has similar sedative effects. it is still used in veterinary medicine for inducing surgical anaesthesia. narcobarbitalclinical dataatc coden01ag01 (who) identifiers iupac name 5-(2-bromoprop-2-en-1-yl)-5-isopropyl-1-methylpyrimidine-2,4,6(1h,3h,5h)-trione cas number125-55-3 ypubchem cid18735chemspider17691 yuniia77u8g9h84keggc17722 ychemblchembl92963 ychemical and physical dataformulac11h15brn2o3molar mass303.156 g·mol−13d model (jsmol)interactive image smiles o=c1n(c(=o)nc(=o)c1(cc(\br)=c)c(c)c)c inchi inchi=1s/c11h15brn2o3/c1-6(2)11(5-7(3)12)8(15)13-10(17)14(4)9(11)16/h6h,3,5h2,1-2,4h3,(h,13,15,17) ykey:wgmasvshosnkmf-uhfffaoysa-n y (verify)