CompoundList
Sign in
Central nervous system drugs

Fenethylline

Also known as Fenetylline, Phenethylline, Amfetyline

CAS 3736-08-1Formula C18H23N5O2Molar mass 341.42 g/molEC 609-418-3
Prohibited, not for trade
Why it is not for trade
Fenethylline chemical structure, C18H23N5O2, CAS 3736-08-1
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
3736-08-1
Formula
C18H23N5O2
Molar mass
341.42 g/mol
EC number
609-418-3
HS code
293951
Category
Central nervous system drugs

What is Fenethylline?

Plain description, key identifiers and synonyms

Fenetylline is an oxopurine.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
1,3-dimethyl-7-[2-(1-phenylpropan-2-ylamino)ethyl]purine-2,6-dione
CAS number
3736-08-1 CAS number cross-checkedOther or deprecated CAS: 765207-54-3, 802018-96-8
EC number
609-418-3
Molecular formula
C18H23N5O2
UNII
76284FBU6H, CP55WHR66R, YZ0N7VL5R3
InChIKey
NMCHYWGKBADVMK-UHFFFAOYSA-N
InChI
InChI=1S/C18H23N5O2/c1-13(11-14-7-5-4-6-8-14)19-9-10-23-12-20-16-15(23)17(24)22(3)18(25)21(16)2/h4-8,12-13,19H,9-11H2,1-3H3
SMILES (canonical and isomeric)
CC(CC1=CC=CC=C1)NCCN2C=NC3=C2C(=O)N(C(=O)N3C)C

Synonyms

  • Fenetylline
  • Phenethylline
  • Amfetyline
  • Captagon
  • Fenetyllin
  • Amphetaminoethyltheophylline
  • Theophyllineethylamphetamine
  • Fenetylinum
  • Fenetilina
  • Fitton
  • Humburg 814
  • Fenetillina
  • Fenetyllinum
  • Homburg-814
  • Theophylline, 7-(2-((alpha-methylphenethyl)amino)ethyl)-
  • 7-(2-((alpha-Methylphenethyl)amino)ethyl)theophylline
  • 1H-Purine-2,6-dione, 3,7-dihydro-1,3-dimethyl-7-(2-((1-methyl-2-phenylethyl)amino)ethyl)-
  • 1H-Purine-2,6-dione, 3,7-dihydro-1,3-dimethyl-7-[2-[(1-methyl-2-phenylethyl)amino]ethyl]-
  • 7-ethyltheophyllineamphetamine
  • 1,3-dimethyl-7-(2-((1-phenylpropan-2-yl)amino)ethyl)-2,3,6,7-tetrahydro-1H-purine-2,6-dione
  • Fenetylline, (+)-
  • Fenethylline, (+)-
  • Fenetylline, (-)-
  • Fenethylline, (-)-
  • Fenetylline (INN)
Show all 30 synonyms
  • 1H-Purine-2,6-dione, 3,7-dihydro-1,3-dimethyl-7-(2-((1-methyl-2-phenylethyl)amino)ethyl)-, (+)-
  • 1H-Purine-2,6-dione, 3,7-dihydro-1,3-dimethyl-7-(2-((1-methyl-2-phenylethyl)amino)ethyl)-, (-)-
  • Ethylteophylline amphetamine
  • DEA No. 1503
  • Fitton (TN)

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
341.42 g/molcalc.
Exact mass
341.1852 Dacalc.
LogP (octanol/water)
0.65calc.
Topological polar surface area
73.85 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
6calc.
Heavy atoms
25calc.
Rings
3calc.
Aromatic rings
3calc.
Fraction sp3 carbons
0.39calc.
Formal charge
0calc.
Stereocentres
1calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, O=c1[nH]c(=O)c2c(ncn2CCNCCc2ccccc2)[nH]1

O=c1[nH]c(=O)c2c(ncn2CCNCCc2ccccc2)[nH]1

3 rings, 22 atoms.

22 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Fenethylline suppliers

Trading restrictions apply to this substance

Psychotropic substance

Fenethylline is prohibited on CompoundList. Listings, quotes and messages are disabled. This page is kept for information only.

Listing and enquiries are not allowed for this substance.

Reference: UN Convention on Psychotropic Substances 1971, HS 2022 subheading 2939.51 (fenetylline)

Our policy on controlled substances

Fenethylline price

Indicative price range per kg from live supplier offers

Prices are not shown for prohibited substances.

Uses and applications

What the substance is used for, by industry and function

Fenethylline (DEA Code Number: 1503) is a Schedule I controlled substance.

Schedule I Controlled Substance: (A) The drug or other substance has a high potential for abuse, (B) The drug or other substance has no currently accepted medical use in treatment in the United States, and (C) There is a lack of accepted safety for use of the drug or other substance under medical supervision.

Central Nervous System Stimulants.

Use classes: Pharmaceuticals.

Industries and functions

Pharmacological actions

  • Central Nervous System Stimulants

Functional uses

  • Pharmaceutical

How it is made

Preparation from 7-(beta-chloroethyl)theophylline and amphetamine: Kholstaedt, Klinger, German patent 1123329 (1962 to Degussa)

Regulatory status

Inventories, regulations and trade controls that list this substance

Psychotropic substance

Fenethylline is prohibited on CompoundList. Listings, quotes and messages are disabled. This page is kept for information only.

Listing and enquiries are not allowed for this substance.

Reference: UN Convention on Psychotropic Substances 1971, HS 2022 subheading 2939.51 (fenetylline)

Our policy on controlled substances

Controls

  • US DEA controlled substance or listed chemical
  • Controlled psychotropic substance

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Fenethylline is traded under.

HS 2939.51Exact HS code

Fenetylline (INN) and its salts

World exports in 2024
$5.92K
−75.7% vs 2023, imports $457K
2019 to 2024
Top exporters
  1. South Africa62.9%
  2. Hungary19.8%
  3. Germany14.2%
Top importers
  1. Egypt50.5%
  2. South Korea48.5%
  3. Zimbabwe * partner reported0.8%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Fenethylline is indicative (it was matched by name in the HS nomenclature). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Fenethylline, based on the data on this page

What is Fenethylline?

Fenetylline is an oxopurine.

What is the CAS number of Fenethylline?

The CAS registry number of Fenethylline is 3736-08-1. Other or deprecated CAS numbers: 765207-54-3, 802018-96-8.

What is the molecular formula and weight of Fenethylline?

The molecular formula of Fenethylline is C18H23N5O2 and its molar mass is 341.42 g/mol.

What is Fenethylline used for?

Fenethylline (DEA Code Number: 1503) is a Schedule I controlled substance. Schedule I Controlled Substance: (A) The drug or other substance has a high potential for abuse, (B) The drug or other substance has no currently accepted medical use in treatment in the United States, and (C) There is a lack of accepted safety…

Is Fenethylline hazardous?

No GHS hazard classification for Fenethylline is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Fenethylline?

Fenethylline is usually classified under HS code 293951 (Fenetylline (INN) and its salts). This is indicative, confirm it with your customs broker before shipping.

Can I buy Fenethylline on CompoundList?

No. Fenethylline is on our prohibited list, so listings, quotes and messages for it are disabled. This page is kept for information only.

Guides for buyers

Practical guides that help when you source, ship or handle Fenethylline

Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page

Explore more in Central nervous system drugs or HS code 293951

Not available for trade
Why