Title: a-Methylfentanyl
CAS Registry Number: 79704-88-4
CAS Name: N-[1-(1-Methyl-2-phenylethyl)-4-piperidinyl]-N-phenylpropanamide
Additional Names: N-[1-(a-methylphenethyl)-4-piperidyl]propionanilide; 1-(1-methyl-2-phenylethyl)-4-(N-propanilido)piperidine
Molecular Formula: C23H30N2O
Molecular Weight: 350.50
Percent Composition: C 78.81%, H 8.63%, N 7.99%, O 4.56%
Literature References: Potent derivative of fentanyl, q.v. Prepn: P. A. J. Janssen, FR M2430; idem, US 3164600 (1964, 1965 both to Janssen). This substance has erroneously been referred to as "China White", the street term for very pure Southeast Asian heroin. Initial identification of "China White" as a-methylfentanyl: T. C. Kram et al., Anal. Chem. 53, 1379 A (1981). Molecular structure determn using tandem mass spectrometry: M. T. Cheng et al., ibid. 54, 2204 (1982). Identification and quantification in tissue: T. J. Gillespie et al., J. Anal. Toxicol. 6, 139 (1982). Confirmation of identity of "China White": S. Suzuki et al., Chem. Pharm. Bull. 34, 1340 (1986). Immunoassay for detection of use in racehorses: J. McDonald et al., Res. Commun. Chem. Pathol. Pharmacol. 57, 389 (1987).
Derivative Type: Hydrochloride
CAS Registry Number: 1443-44-3
Molecular Formula: C23H30N2O.HCl
Molecular Weight: 386.96
Percent Composition: C 71.39%, H 8.07%, N 7.24%, O 4.13%, Cl 9.16%
Properties: Crystals from isopropanol, mp 272.8-273.6°.
Melting point: mp 272.8-273.6°
NOTE: This is a controlled substance (opiate): 21 CFR, 1308.11.
alpha-Methylglucoside alpha-Methyl-m-tyrosine alpha-Methyltryptamine alphaMNP alpha-Naphtholphthalein

Systematic (IUPAC) name
Clinical data
Legal status Schedule I (US)
CAS number 79704-88-4 YesY
ATC code None
PubChem CID 62281
DrugBank DB01557
ChemSpider 56081 YesY
Chemical data
Formula C23H30N2O 
Mol. mass 350.497 g/mol
 YesY (what is this?)  (verify)

α-Methylfentanyl (or alpha-Methylfentanyl) is an opioid analgesic that is an analog of fentanyl.