crotylbarbital crotylbarbital crotylbarbital (mepertan, kalipnon, barotal), also known as crotarbital, is a barbiturate derivative developed by eli lilly in the 1930s it has sedative and hypnotic effects, and was used for the treatment of insomnia until it was replaced by newer alternative drugs with less side effects and lower risk of overdose. crotylbarbitalclinical dataatc codenoneidentifiers iupac name 5-but-2-enyl-5-ethyl-1,3-diazinane-2,4,6-trione cas number1952-67-6 ypubchem cid5364821chemspider4516954 yuniisxw2hl5ju7comptox dashboard (epa)dtxsid90905095 echa infocard100.016.162 chemical and physical dataformulac10h14n2o3molar mass210.233 g·mol−13d model (jsmol)interactive image smiles o=c1nc(=o)nc(=o)c1(cc)c/c=c/c inchi inchi=1s/c10h14n2o3/c1-3-5-6-10(4-2)7(13)11-9(15)12-8(10)14/h3,5h,4,6h2,1-2h3,(h2,11,12,13,14,15)/b5-3+ ykey:knmohcleinxvbg-hwkanzrosa-n y (verify)