allobarbital allobarbital allobarbital, also known as allobarbitone and branded as dial, cibalgine (in combination with aminophenazone), or dial-ciba (in combination with ethyl carbamate), is a barbiturate derivative invented in 1912 by ernst preiswerk and ernst grether working for ciba. it was used primarily as an anticonvulsant although it has now largely been replaced by newer drugs with improved safety profiles. other uses for allobarbital included as an adjutant to boost the activity of analgesic drugs, and use in the treatment of insomnia and anxiety. allobarbitalclinical dataother names5,5-diallylbarbituric acid, allobarbitalatc coden05ca21 (who) legal statuslegal status ca: schedule iv de: anlage iii (special prescription form required) us: schedule iii identifiers iupac name 5,5-di(prop-2-en-1-yl)-1,3-diazinane-2,4,6-trione cas number52-43-7 ypubchem cid5842chemspider5635 yunii8nt43gg2hakeggd02817 ychemblchembl267719 ycomptox dashboard (epa)dtxsid9022572 echa infocard100.000.129 chemical and physical dataformulac10h12n2o3molar mass208.217 g·mol−13d model (jsmol)interactive image smiles o=c1nc(=o)nc(=o)c1(c\c=c)c\c=c inchi inchi=1s/c10h12n2o3/c1-3-5-10(6-4-2)7(13)11-9(15)12-8(10)14/h3-4h,1-2,5-6h2,(h2,11,12,13,14,15) ykey:fdqgnlowmmvrql-uhfffaoysa-n y (verify) allobarbital was never particularly widely used compared to better known barbiturates such as phenobarbital and secobarbital, although it saw more use in some european countries such as bulgaria and slovakia, and is still used in for example poland, but only as compound.