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Peptides

Pro-Arg

Also known as Prolylarginine, L-prolyl-L-arginine, H-Pro-Arg-OH

CAS 2418-74-8Formula C11H21N5O3Molar mass 271.32 g/mol
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Pro-Arg chemical structure, C11H21N5O3, CAS 2418-74-8
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
2418-74-8
Formula
C11H21N5O3
Molar mass
271.32 g/mol
HS code
293399
Category
Peptides

What is Pro-Arg?

Plain description, key identifiers and synonyms

Pro-Arg is a dipeptide formed from L-proline and L-arginine residues. It has a role as a metabolite. It is functionally related to a L-arginine and a L-proline.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(2S)-5-(diaminomethylideneamino)-2-[[(2S)-pyrrolidine-2-carbonyl]amino]pentanoic acid
CAS number
2418-74-8 CAS number cross-checked
Molecular formula
C11H21N5O3
InChIKey
HMNSRTLZAJHSIK-YUMQZZPRSA-N
InChI
InChI=1S/C11H21N5O3/c12-11(13)15-6-2-4-8(10(18)19)16-9(17)7-3-1-5-14-7/h7-8,14H,1-6H2,(H,16,17)(H,18,19)(H4,12,13,15)/t7-,8-/m0/s1
Canonical SMILES
NC(N)=NCCCC(NC(=O)C1CCCN1)C(=O)O
Isomeric SMILES
C1C[C@H](NC1)C(=O)N[C@@H](CCCN=C(N)N)C(=O)O

Synonyms

  • Prolylarginine
  • L-prolyl-L-arginine
  • H-Pro-Arg-OH
  • prolyl-arginine
  • (2S)-5-(diaminomethylideneamino)-2-[[(2S)-pyrrolidine-2-carbonyl]amino]pentanoic acid
  • (S)-5-Guanidino-2-((S)-pyrrolidine-2-carboxamido)pentanoic acid
  • L-Arginine, L-prolyl-
  • H-Pro-Arg-OH acetate salt
  • H-Pro-Arg
  • L-Pro-L-Arg
  • L-Arginine, N2-L-prolyl-
  • L-Prolyl-N~5~-(diaminomethylidene)-L-ornithine
  • (2S)-5-guanidino-2-[[(2S)-pyrrolidine-2-carbonyl]amino]pentanoic acid
  • (S)-5-Guanidino-2-[((S)-pyrrolidine-2-carbonyl)-amino]-pentanoic acid
  • (2S)-5-[(diaminomethylidene)amino]-2-{[(2S)-pyrrolidin-2-yl]formamido}pentanoic acid
  • P-R

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
271.32 g/molcalc.
Exact mass
271.1644 Dacalc.
LogP (octanol/water)
-1.64calc.
Topological polar surface area
142.8 Ųcalc.
Hydrogen bond donors
5calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
7calc.
Heavy atoms
19calc.
Rings
1calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.73calc.
Formal charge
0calc.
Stereocentres
2calc.
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, C1CCNC1

C1CCNC1

1 ring, 5 atoms, the Pyrrolidine ring system.

22,348 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.

Pro-Arg suppliers

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Pro-Arg price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Roles

  • metabolite

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Pro-Arg is traded under.

HS 2933.99Indicative HS code

Heterocyclic compounds with nitrogen hetero-atom(s) only, other

World exports in 2024
$12.1B
−31.0% vs 2023, imports $28.8B
2019 to 2024
Top exporters
  1. China30.5%
  2. India * partner reported16.3%
  3. Ireland9.0%
Top importers
  1. Slovenia31.7%
  2. Italy24.2%
  3. United States5.0%

* Partner reported figures, a lower bound.

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

The HS code shown for Pro-Arg is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Pro-Arg, based on the data on this page

What is Pro-Arg?

Pro-Arg is a dipeptide formed from L-proline and L-arginine residues. It has a role as a metabolite. It is functionally related to a L-arginine and a L-proline.

What is the CAS number of Pro-Arg?

The CAS registry number of Pro-Arg is 2418-74-8.

What is the molecular formula and weight of Pro-Arg?

The molecular formula of Pro-Arg is C11H21N5O3 and its molar mass is 271.32 g/mol.

What is Pro-Arg used for?

Known uses and roles of Pro-Arg include metabolite.

Is Pro-Arg hazardous?

No GHS hazard classification for Pro-Arg 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 Pro-Arg?

Pro-Arg is usually classified under HS code 293399 (Heterocyclic compounds with nitrogen hetero-atom(s) only, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Pro-Arg?

Post a free request on CompoundList and suppliers of Pro-Arg will send you quotes. Your contact details stay private until you accept a quote.

What is the price of Pro-Arg?

Suppliers quote Pro-Arg on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Pro-Arg

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