1-(1-Phenylcyclohexyl)-4-hydroxypiperidine (PCHP) is a metabolite of phencyclidine (PCP).[1] PCHP can be detected in the hair, urine, stool, sweat, and saliva of PCP users.[2]
^Nabeshima, Toshitaka; Yamaguchi, Kazumasa; Fukaya, Hiroaki; Hiramatsu, Masayuki; Furukawa, Hiroshi; Kameyama, Tsutomu (1985). "Simultaneous determination of phencyclidine and its major metabolites in biological samples by high-performance liquid chromatography". Research Communications in Substances of Abuse. 6 (2): 65–78.