4-keto-pcp 4-keto-pcp 4-keto-pcp is a recreational designer drug from the arylcyclohexylamine family, with dissociative effects. it has potency in between that of ketamine and phencyclidine but with somewhat more sedating effects in animal studies. 4-keto-pcpidentifiers iupac name 4-phenyl-4-piperidin-1-ylcyclohexan-1-one cas number65620-13-5pubchem cid13306756chemical and physical dataformulac17h23nomolar mass257.377 g·mol−13d model (jsmol)interactive image smiles c1ccn(cc1)c2(ccc(=o)cc2)c3=cc=cc=c3 inchi inchi=1s/c17h23no/c19-16-9-11-17(12-10-16,15-7-3-1-4-8-15)18-13-5-2-6-14-18/h1,3-4,7-8h,2,5-6,9-14h2key:hbvubdnrzwjtsb-uhfffaoysa-n