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2D Structure
Also known as: 1474-02-8, Benzyl fentanyl, N-(1-benzylpiperidin-4-yl)-n-phenylpropionamide, N-(1-benzylpiperidin-4-yl)-n-phenylpropanamide, N-benzylfentanyl, 9bv2d1a57h
Molecular Formula
C21H26N2O
Molecular Weight
322.4  g/mol
InChI Key
POQDXIFVWVZVML-UHFFFAOYSA-N
FDA UNII
9BV2D1A57H

Benzylfentanyl (R-4129) is a fentanyl analog opioid that was on the list of Schedule I drugs in America in 1985 due to its structural similarity to fentanyl. In 2010 it was removed from the list after it was found to have minimal opioid activity. Benzylfentanyl has a Ki of 213nM at the mu opioid receptor, binding around 200x less strongly than fentanyl itself.
1 2D Structure

2D Structure

2 Identification
2.1 Computed Descriptors
2.1.1 IUPAC Name
N-(1-benzylpiperidin-4-yl)-N-phenylpropanamide
2.1.2 InChI
InChI=1S/C21H26N2O/c1-2-21(24)23(19-11-7-4-8-12-19)20-13-15-22(16-14-20)17-18-9-5-3-6-10-18/h3-12,20H,2,13-17H2,1H3
2.1.3 InChI Key
POQDXIFVWVZVML-UHFFFAOYSA-N
2.1.4 Canonical SMILES
CCC(=O)N(C1CCN(CC1)CC2=CC=CC=C2)C3=CC=CC=C3
2.2 Other Identifiers
2.2.1 UNII
9BV2D1A57H
2.3 Synonyms
2.3.1 MeSH Synonyms

1. Benzylfentanyl Hydrochloride

2.3.2 Depositor-Supplied Synonyms

1. 1474-02-8

2. Benzyl Fentanyl

3. N-(1-benzylpiperidin-4-yl)-n-phenylpropionamide

4. N-(1-benzylpiperidin-4-yl)-n-phenylpropanamide

5. N-benzylfentanyl

6. 9bv2d1a57h

7. Nsc-73402

8. N-(1-benzyl-4-piperidinyl)-n-phenylpropanamide

9. Propanamide, N-phenyl-n-(1-benzyl-4-piperidinyl)-

10. Propanamide, N-phenyl-n-(1-(phenylmethyl)-4-piperidinyl)-

11. Propanamide, N-phenyl-n-[1-(phenylmethyl)-4-piperidinyl]-

12. Ncgc00247689-01

13. Nsc 73402

14. Unii-9bv2d1a57h

15. R 4129

16. Dea 9818

17. Nsc73402

18. Einecs 216-014-7

19. Fentanyl Methyl Analog

20. 1-benzyl-4-(n-phenylpropionamido)piperidine

21. Chembl172155

22. Schembl6045571

23. Dtxsid00163705

24. Fentanyl Related Compound F

25. Amy10844

26. Zinc4808161

27. Akos015917921

28. Ccg-279476

29. Db09182

30. N-(1-benzyl-4-piperidinyl)propionanilide

31. Db-012482

32. R-4129

33. N-(1-benzyl-4-piperidinyl)-n-phenylpropionamide

34. An-651/14405020

35. Fentanyl Citrate Impurity H [ep Impurity]

36. Fentanyl Related Compound F [usp Impurity]

37. N-(1-benzyl-4-piperidinyl)-n-phenylpropanamide #

38. Q15634056

2.4 Create Date
2005-03-26
3 Chemical and Physical Properties
Molecular Weight 322.4 g/mol
Molecular Formula C21H26N2O
XLogP33.6
Hydrogen Bond Donor Count0
Hydrogen Bond Acceptor Count2
Rotatable Bond Count5
Exact Mass322.204513457 g/mol
Monoisotopic Mass322.204513457 g/mol
Topological Polar Surface Area23.6 Ų
Heavy Atom Count24
Formal Charge0
Complexity377
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
Covalently Bonded Unit Count1