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Peptides

L-Tryptophyl-L-proline

Also known as H-Trp-Pro-OH, (2S)-1-[(2S)-2-amino-3-(1H-indol-3-yl)propanoyl]pyrrolidine-2-carboxylic acid, WP dipeptide

CAS 38136-75-3Formula C16H19N3O3Molar mass 301.35 g/molEC 917-507-6
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L-Tryptophyl-L-proline chemical structure, C16H19N3O3, CAS 38136-75-3
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
38136-75-3
Formula
C16H19N3O3
Molar mass
301.35 g/mol
EC number
917-507-6
HS code
293399
Category
Peptides

What is L-Tryptophyl-L-proline?

Plain description, key identifiers and synonyms

Trp-Pro is a dipeptide obtained by formal condensation of the carboxy group of L-tryptophan with the amino group of L-proline. It is functionally related to a L-tryptophan and a L-proline.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(2S)-1-[(2S)-2-amino-3-(1H-indol-3-yl)propanoyl]pyrrolidine-2-carboxylic acid
CAS number
38136-75-3
EC number
917-507-6
Molecular formula
C16H19N3O3
MDL number
MFCD00191033
InChIKey
DXYQIGZZWYBXSD-JSGCOSHPSA-N
InChI
InChI=1S/C16H19N3O3/c17-12(15(20)19-7-3-6-14(19)16(21)22)8-10-9-18-13-5-2-1-4-11(10)13/h1-2,4-5,9,12,14,18H,3,6-8,17H2,(H,21,22)/t12-,14-/m0/s1
Canonical SMILES
NC(Cc1c[nH]c2ccccc12)C(=O)N1CCCC1C(=O)O
Isomeric SMILES
C1C[C@H](N(C1)C(=O)[C@H](CC2=CNC3=CC=CC=C32)N)C(=O)O

Synonyms

  • H-Trp-Pro-OH
  • (2S)-1-[(2S)-2-amino-3-(1H-indol-3-yl)propanoyl]pyrrolidine-2-carboxylic acid
  • WP dipeptide
  • W-P Dipeptide
  • Tryptophan Proline dipeptide
  • Tryptophanyl-proline
  • L-Tryptophanyl-L-proline
  • WP
  • W-P

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
301.35 g/molcalc.
Exact mass
301.1426 Dacalc.
LogP (octanol/water)
1.11calc.
Topological polar surface area
99.42 Ųcalc.
Hydrogen bond donors
3calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
4calc.
Heavy atoms
22calc.
Rings
3calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0.38calc.
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, O=C(CCc1c[nH]c2ccccc12)N1CCCC1

O=C(CCc1c[nH]c2ccccc12)N1CCCC1

3 rings, 18 atoms.

16 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.

L-Tryptophyl-L-proline suppliers

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Where suppliers are based

1 supplier in 1 country

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L-Tryptophyl-L-proline 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

Applications are not documented for this substance yet. Suppliers often describe uses on their product pages, linked in the suppliers list above.

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 L-Tryptophyl-L-proline 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 L-Tryptophyl-L-proline is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about L-Tryptophyl-L-proline, based on the data on this page

What is L-Tryptophyl-L-proline?

Trp-Pro is a dipeptide obtained by formal condensation of the carboxy group of L-tryptophan with the amino group of L-proline. It is functionally related to a L-tryptophan and a L-proline.

What is the CAS number of L-Tryptophyl-L-proline?

The CAS registry number of L-Tryptophyl-L-proline is 38136-75-3.

What is the molecular formula and weight of L-Tryptophyl-L-proline?

The molecular formula of L-Tryptophyl-L-proline is C16H19N3O3 and its molar mass is 301.35 g/mol.

Is L-Tryptophyl-L-proline hazardous?

No GHS hazard classification for L-Tryptophyl-L-proline 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 L-Tryptophyl-L-proline?

L-Tryptophyl-L-proline 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 L-Tryptophyl-L-proline?

CompoundList lists 1 supplier of L-Tryptophyl-L-proline in United States. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of L-Tryptophyl-L-proline?

Suppliers quote L-Tryptophyl-L-proline 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 L-Tryptophyl-L-proline

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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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