ethinamate ethinamate ethinamate (valamin, valmid) is a short-acting carbamate-derivative sedative-hypnotic medication used to treat insomnia. regular use leads to drug tolerance, and it is usually not effective for more than 7 days. prolonged use can lead to dependency. ethinamateclinical dataahfs/drugs.commicromedex detailed consumer informationroutes ofadministrationoralatc codenonelegal statuslegal status ca: schedule iv de: anlage ii (authorized trade only, not prescriptible) uk: class c us: schedule iv in general: ℞ (prescription only) identifiers iupac name (1-ethynylcyclohexyl)carbamate cas number126-52-3 ypubchem cid3284iuphar/bps7325drugbankdb01031 ychemspider3169 yuniiian371pp48keggd00703 ychebichebi:4884 ychemblchembl1576 ycomptox dashboard (epa)dtxsid7023013 echa infocard100.004.355 chemical and physical dataformulac9h13no2molar mass167.208 g·mol−13d model (jsmol)interactive image smiles o=c(oc1(c#c)ccccc1)n inchi inchi=1s/c9h13no2/c1-2-9(12-8(10)11)6-4-3-5-7-9/h1h,3-7h2,(h2,10,11) ykey:gxrzimhkgdibew-uhfffaoysa-n y (verify) ethinamate has been replaced by other medicines (particularly benzodiazepines), and it is not available in the netherlands, the united states or canada. it is a schedule iv substance in the united states. synthesis ethinamate (1-ethynylcyclohexanone carbamate) is synthesized by combining acetylene with cyclohexanone to make 1-ethynylcyclohexanol, and then transforming this into a carbamate by the subsequent reaction with phosgene, and later with ammonia. some lithium metal or similar is used to make the acetylene react with the cyclohexanone in the first step.