Eticyclidine (PCE, CI-400) is a dissociativeanesthetic 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,[2] but research into PCE was not continued after the development of ketamine, a similar drug with more favourable properties.[3] 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.
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^Kalir A, Edery H, Pelah Z, Balderman D, Porath G (May 1969). "1-Phenycycloalkylamine derivatives. II. Synthesis and pharmacological activity". Journal of Medicinal Chemistry. 12 (3): 473–7. doi:10.1021/jm00303a030. PMID4977945.