eticyclidine eticyclidine eticyclidine (pce, ci-400) is a dissociative anesthetic drug with hallucinogenic effects. it is similar in effects to phencyclidine but is slightly more potent. pce was developed by parke-davis in the 1970s and evaluated for anesthetic potential under the code name ci-400, but research into pce was not continued after the development of ketamine, a similar drug with more favourable properties. pce is slightly more potent than pcp and has similar effects, but its unpleasant taste and tendency to cause nausea made it less accepted by users. due to its similarity in effects to pcp, pce was placed into the schedule 1 list of illegal drugs in the 1970s, although it was only briefly abused in the 1970s and 1980s and is now little known. eticyclidineclinical dataatc codenonelegal statuslegal status au: s9 (prohibited substance) ca: schedule iii de: anlage i (authorized scientific use only) uk: class b us: schedule i un: psychotropic schedule i identifiers iupac name n-ethyl-1-phenylcyclohexylamine cas number2201-15-2 ypubchem cid16622chemspider15759 yuniio8i1ll6a89chemblchembl279924 ycomptox dashboard (epa)dtxsid2062248 chemical and physical dataformulac14h21nmolar mass203.329 g·mol−13d model (jsmol)interactive image smiles ccnc1(ccccc1)c2=cc=cc=c2 inchi inchi=1s/c14h21n/c1-2-15-14(11-7-4-8-12-14)13-9-5-3-6-10-13/h3,5-6,9-10,15h,2,4,7-8,11-12h2,1h3 ykey:ifylvuhloocybg-uhfffaoysa-n y (verify)