thiamylal thiamylal thiamylal (surital) is a barbiturate derivative invented in the 1950s. it has sedative, anticonvulsant, and hypnotic effects, and is used as a strong but short acting sedative. thiamylal is still in current use, primarily for induction in surgical anaesthesia or as an anticonvulsant to counteract side effects from other anaesthetics. it is the thiobarbiturate analogue of secobarbital. thiamylalclinical dataother namesthiamylal, thioseconal, suritalahfs/drugs.cominternational drug namesatcvet codeqn01af90 (who) legal statuslegal status ca: schedule iv us: schedule iii pharmacokinetic datametabolismhepaticelimination half-life14.3 h (cats)identifiers iupac name 5-(pentan-2-yl)-5-(prop-2-en-1-yl)-2-sulfanylidenedihydropyrimidine-4,6(1h,5h)-dione cas number77-27-0 ypubchem cid3032285iuphar/bps7305drugbankdb01154 ychemspider2297298 yunii01t23w89frkeggd06106 ychebichebi:9536 ychemblchembl440 ycomptox dashboard (epa)dtxsid3048441 echa infocard100.000.927 chemical and physical dataformulac12h18n2o2smolar mass254.35 g·mol−13d model (jsmol)interactive image smiles o=c1nc(=s)nc(=o)c1(c(c)ccc)c\c=c inchi inchi=1s/c12h18n2o2s/c1-4-6-8(3)12(7-5-2)9(15)13-11(17)14-10(12)16/h5,8h,2,4,6-7h2,1,3h3,(h2,13,14,15,16,17) ykey:xlomzpuitcylmj-uhfffaoysa-n y (verify)