{"Aliases":["Cyclopentyl fentanyl","Cyclopentyl-fentanyl","DEA No. 9847","N-(1-Phenethyl-4-piperidyl)-N-phenyl-cyclopentanecarboxamide","N-(1-Phenethylpiperidin-4-yl)-N-phenylcyclopentanecarboxamide","N-phenyl-n-(1-(2-phenylethyl)piperidin-4-yl)cyclopentanecarboxamide","Dtxcid301520872","CP-F","Schembl18623774","NID91801"],"CAS":"2088918-01-6","ChemicalClasses":["phenethylpiperidine"],"Chirality":"achiral","Classes":["Opioid"],"DTXSID":"801036783","EliminationHalfLife":"","Erowid Experience Reports":[],"Esters":[],"Formating":[],"HeavyAtomCount":28,"IUPACName":"N-phenyl-N-[1-(2-phenylethyl)piperidin-4-yl]cyclopentanecarboxamide","InChI":"InChI=1S/C25H32N2O/c28-25(22-11-7-8-12-22)27(23-13-5-2-6-14-23)24-16-19-26(20-17-24)18-15-21-9-3-1-4-10-21/h1-6,9-10,13-14,22,24H,7-8,11-12,15-20H2","InChIKey":"PEASFKSPITUZGT-UHFFFAOYSA-N","MeSH Headers":[],"MolecularFormula":"C\u003csub\u003e25\u003c/sub\u003eH\u003csub\u003e32\u003c/sub\u003eN\u003csub\u003e2\u003c/sub\u003eO","MolecularWeight":"376.5 g/mol","PubChemId":126682248,"PubChemTitle":"Cyclopentylfentanyl","Reagents":[],"Record Description":["WIKIPEDIA|FENTANYL ANALOGUES","Wikipedia|List of designer drugs|Sedatives|Opioids"],"Records":{"UNII":{"Impurities":[]}},"RefChem":"581098","RefCount":3,"RefCur":"","References":[{"Name":"Wikipedia","Urls":[{"Link":"https://en.wikipedia.org/wiki/Cyclopentylfentanyl","Name":"Cyclopentylfentanyl","Sub":false}]},{"Name":"Wikidata","Urls":[{"Link":"https://www.wikidata.org/wiki/Q48840024","Name":"Cyclopentylfentanyl","Sub":false}]},{"Name":"PubChem","Urls":[{"Link":"https://pubchem.ncbi.nlm.nih.gov/compound/126682248","Name":"Cyclopentylfentanyl","Sub":false}]},{"Name":"Common Chemistry","Urls":[{"Link":"https://commonchemistry.cas.org/detail?cas_rn=2088918-01-6","Name":"Cyclopentylfentanyl","Sub":false}]},{"Name":"UNII","Urls":[{"Link":"https://gsrs.ncats.nih.gov/ginas/app/ui/substances/79NY29L78C","Name":"Cyclopentylfentanyl","Sub":false}]},{"Name":"EPA DSSTox","Urls":[{"Link":"https://comptox.epa.gov/dashboard/chemical/details/DTXSID801036783","Name":"Cyclopentylfentanyl","Sub":false}]}],"Refs":["National Center for Biotechnology Information. PubChem Compound Summary for CID 126682248, Cyclopentylfentanyl. Accessed May 25, 2026. \u003ca href=https://pubchem.ncbi.nlm.nih.gov/compound/126682248\u003ehttps://pubchem.ncbi.nlm.nih.gov/compound/126682248\u003c/a\u003e","U.S. Food and Drug Administration; National Center for Advancing Translational Sciences. Cyclopentylfentanyl. UNII: 79NY29L78C. Global Substance Registration System. Accessed May 25, 2026. \u003ca href=https://gsrs.ncats.nih.gov/ginas/app/beta/substances/79NY29L78C\u003ehttps://gsrs.ncats.nih.gov/ginas/app/beta/substances/79NY29L78C\u003c/a\u003e"],"SMILES":"C1CCC(C1)C(=O)N(C2CCN(CC2)CCC3=CC=CC=C3)C4=CC=CC=C4","SaltData":[{"AcidCount":1,"Amine":"Cyclopentylfentanyl","AmineCount":1,"Formula":"Cl","Name":"hydrochloride","RName":"hydrochloride","Structure":"\u003csvg xmlns=\"http://www.w3.org/2000/svg\" preserveAspectRatio=\"none\" style=\"display:block\" viewBox=\"0 0 181.217 101.145\"\u003e\u003crect width=\"100%\" height=\"100%\" fill=\"#fff\"/\u003e\u003cdesc\u003eGenerated by the Chemistry Development Kit (http://github.com/cdk)\u003c/desc\u003e\u003cg fill=\"#1ff01f\" stroke=\"#000\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\".7\"\u003e\u003cpath fill=\"#fff\" stroke=\"none\" d=\"M0 0h182v102H0z\"/\u003e\u003cg class=\"mol\"\u003e\u003cpath d=\"m157.254 41.501-7.843-13.02M149.411 28.481l-14.792 3.227M134.619 31.708l-1.594 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