1-(2-chloro-n-methylbenzimidoyl)cyclopentanol 1-(2-chloro-n-methylbenzimidoyl)cyclopentanol 1-(2-chloro-n-methylbenzimidoyl)cyclopentanol, sometimes misleadingly referred to as hydroxylimine hydrochloride, is a chemical compound which is the final intermediate in the synthesis of ketamine, an anaesthetic drug which is also subject to recreational abuse. this chemical intermediate is not active as a drug in its own right, and is legal in most countries, but is readily converted into ketamine by dissolving it in a suitable high-boiling point solvent and heating, with no other chemicals required. this has made it subject to illicit trade as a drug precursor, and it has sometimes been seized by law enforcement agencies in significant quantities, leading to it being specifically banned as a controlled drug precursor in some jurisdictions such as taiwan. 1-(2-chloro-n-methylbenzimidoyl)cyclopentanolidentifiers iupac name 1-cyclopentan-1-ol cas number6740-87-0hydrochloride: 90717-16-1pubchem cid13086940chemspider26551984uniihgi99h315ncomptox dashboard (epa)dtxsid60217758 echa infocard100.169.732 chemical and physical dataformulac13h16clnomolar mass237.73 g·mol−13d model (jsmol)interactive image smiles cn=c(c1=cc=cc=c1cl)c2(cccc2)o inchi inchi=1s/c13h16clno/c1-15-12(13(16)8-4-5-9-13)10-6-2-3-7-11(10)14/h2-3,6-7,16h,4-5,8-9h2,1h3key:fjgpxupmnzotlx-uhfffaoysa-n