Pidotimod is an immunostimulant.Pidotimod is a synthetic dipeptide molecule with biological and immunological activity on both the adaptive and the innate immune responses. In vitro studies, both from animal and human specimens, have documented a good activity on innate and adaptive immune responses and have been confirmed by in vivo studies. These activities have been applied in clinical studies demonstrating the efficacy of pidotimod in reducing the rate of recurrent infections of the upper respiratory and urinary tracts in children. The same results are obtained in recurrent respiratory tract infections in adults.
A synthetic dipeptide with immunological modulatory activity on both the adaptive and innate immune responses.

Specifications

Synonyms

Specifications & Purity

≥98%

Biochemical and Physiological Mechanisms

Pidotimod is a synthetic dipeptide with immunological modulatory activity on both the adaptive and innate immune responses. This compound has been shown to induce dendritic cell maturation and up-regulate the expression of HLA-DR and co-stimulatory molecu

Storage

Store at 2-8°C

Shipped In

Wet ice

This product requires cold chain shipping. Ground and other economy services are not available.

Note

Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour. Need more advice on solubility, usage and handling? Please visit our frequently asked questions (FAQ) page for more details.

Purity

≥98%

Names and Identifiers

Pubchem Sid	504754013
Pubchem Sid Url	https://pubchem.ncbi.nlm.nih.gov/substance/504754013
Canonical Smiles	C1CC(=O)NC1C(=O)N2CSCC2C(=O)O
IUPAC Name	(4R)-3-[(2S)-5-oxopyrrolidine-2-carbonyl]-1,3-thiazolidine-4-carboxylic acid
InChIKey	UUTKICFRNVKFRG-WDSKDSINSA-N
INCHI	1S/C9H12N2O4S/c12-7-2-1-5(10-7)8(13)11-4-16-3-6(11)9(14)15/h5-6H,1-4H2,(H,10,12)(H,14,15)/t5-,6-/m0/s1
Isomeric SMILES	C1CC(=O)N[C@@H]1C(=O)N2CSC[C@H]2C(=O)O
Molecular Weight	244.27
Reaxy-Rn	13195670
Reaxys-RN_link_address	https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=13195670&ln=

Documentation

📋 Safety Data Sheet (SDS)

Comprehensive hazard, handling, storage, and regulatory compliance document.

Download SDS →

✅ Certificate of Analysis (COA)

Lot-specific quality data. Enter your lot number to retrieve the exact COA.

Look up COA →

📊 Datasheet

Quick-reference summary of product specifications and applications.

View datasheet →

🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

View spec sheet →

Advanced Data

Taxonomic Classification

Taxonomy Tree

Kingdom Organic compounds
- Superclass Organic acids and derivatives
  - Class Carboxylic acids and derivatives
    - Subclass Amino acids, peptides, and analogues
      - Level5 Peptides
        Level6 Dipeptides

Kingdom	Organic compounds
Superclass	Organic acids and derivatives
Class	Carboxylic acids and derivatives
Subclass	Amino acids, peptides, and analogues
Intermediate Tree Nodes	Peptides
Direct Parent	Dipeptides
Alternative Parents	N-acyl-L-alpha-amino acids Alpha amino acid amides Pyrrolidinecarboxamides Pyrrolidine-2-ones Thiazolidines Tertiary carboxylic acid amides Secondary carboxylic acid amides Lactams Thiohemiaminal derivatives Azacyclic compounds Carboxylic acids Dialkylthioethers Monocarboxylic acids and derivatives Hydrocarbon derivatives Organopnictogen compounds Carbonyl compounds Organonitrogen compounds Organic oxides
Molecular Framework	Aliphatic heteromonocyclic compounds
Substituents	Alpha-dipeptide - N-acyl-l-alpha-amino acid - Alpha-amino acid amide - Alpha-amino acid or derivatives - Pyrrolidine carboxylic acid or derivatives - Pyrrolidine-2-carboxamide - Pyrrolidone - 2-pyrrolidone - Pyrrolidine - Thiazolidine - Tertiary carboxylic acid amide - Carboxamide group - Lactam - Secondary carboxylic acid amide - Carboxylic acid - Monocarboxylic acid or derivatives - Azacycle - Organoheterocyclic compound - Dialkylthioether - Hemithioaminal - Thioether - Organonitrogen compound - Organic nitrogen compound - Organooxygen compound - Hydrocarbon derivative - Organic oxygen compound - Carbonyl group - Organopnictogen compound - Organic oxide - Aliphatic heteromonocyclic compound
Description	This compound belongs to the class of organic compounds known as dipeptides. These are organic compounds containing a sequence of exactly two alpha-amino acids joined by a peptide bond.
External Descriptors	Not available
1. Djoumbou Feunang Y, Eisner R, Knox C, Chepelev L, Hastings J, Owen G, Fahy E, Steinbeck C, Subramanian S, Bolton E, Greiner R, and Wishart DS. ClassyFire: Automated Chemical Classification With A Comprehensive, Computable Taxonomy. Journal of Cheminformatics, 2016, 8:61. DOI: 10.1186/s13321-016-0174-y

3D Structure

Associated Targets(Human)

ESR1 Tclin Estrogen receptor alpha (17718 Activities)

Discover Target: ESR1

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

NR3C1 Tclin Glucocorticoid receptor (14987 Activities)

Discover Target: NR3C1

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

PGR Tclin Progesterone receptor (8562 Activities)

Discover Target: PGR

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

ADRB2 Tclin Beta-2 adrenergic receptor (11824 Activities)

Discover Target: ADRB2

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

CHRM2 Tclin Muscarinic acetylcholine receptor M2 (10671 Activities)

Discover Target: CHRM2

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

ADRB1 Tclin Beta-1 adrenergic receptor (6630 Activities)

Discover Target: ADRB1

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

HTR1A Tclin Serotonin 1a (5-HT1a) receptor (14969 Activities)

Discover Target: HTR1A

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

ADRA2A Tclin Alpha-2a adrenergic receptor (9450 Activities)

Discover Target: ADRA2A

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

AR Tclin Androgen Receptor (11781 Activities)

Discover Target: AR

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

CHRM1 Tclin Muscarinic acetylcholine receptor M1 (12690 Activities)

Discover Target: CHRM1

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

DRD2 Tclin Dopamine D2 receptor (23596 Activities)

Discover Target: DRD2

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

GABRA1 Tclin GABA receptor alpha-1 subunit (399 Activities)

Discover Target: GABRA1

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

MAOA Tclin Monoamine oxidase A (11911 Activities)

Discover Target: MAOA

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

CNR1 Tclin Cannabinoid CB1 receptor (20913 Activities)

Discover Target: CNR1

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

DRD1 Tclin Dopamine D1 receptor (9720 Activities)

Discover Target: DRD1

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

PTGS1 Tclin Cyclooxygenase-1 (9233 Activities)

Discover Target: PTGS1

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

SLC6A2 Tclin Norepinephrine transporter (10102 Activities)

Discover Target: SLC6A2

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

HRH2 Tclin Histamine H2 receptor (5428 Activities)

Discover Target: HRH2

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

HTR2A Tclin Serotonin 2a (5-HT2a) receptor (14758 Activities)

Discover Target: HTR2A

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

HTR2C Tclin Serotonin 2c (5-HT2c) receptor (11471 Activities)

Discover Target: HTR2C

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

AVPR2 Tclin Vasopressin V2 receptor (2912 Activities)

Discover Target: AVPR2

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

ADORA1 Tclin Adenosine A1 receptor (17603 Activities)

Discover Target: ADORA1

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

AGTR1 Tclin Type-1 angiotensin II receptor (5176 Activities)

Discover Target: AGTR1

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

SLC6A4 Tclin Serotonin transporter (12625 Activities)

Discover Target: SLC6A4

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

ADRA1A Tclin Alpha-1a adrenergic receptor (8359 Activities)

Discover Target: ADRA1A

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

PTGS2 Tclin Cyclooxygenase-2 (13999 Activities)

Discover Target: PTGS2

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

HRH1 Tclin Histamine H1 receptor (7573 Activities)

Discover Target: HRH1

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

OPRM1 Tclin Mu opioid receptor (19785 Activities)

Discover Target: OPRM1

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

DRD3 Tclin Dopamine D3 receptor (14368 Activities)

Discover Target: DRD3

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

AVPR1A Tclin Vasopressin V1a receptor (5412 Activities)

Discover Target: AVPR1A

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

OPRD1 Tclin Delta opioid receptor (15096 Activities)

Discover Target: OPRD1

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

OPRK1 Tclin Kappa opioid receptor (16155 Activities)

Discover Target: OPRK1

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

HTR3A Tclin Serotonin 3a (5-HT3a) receptor (3366 Activities)

Discover Target: HTR3A

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

SLC6A3 Tclin Dopamine transporter (10535 Activities)

Discover Target: SLC6A3

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

GRIN1 Tclin Glutamate (NMDA) receptor subunit zeta 1 (122 Activities)

Discover Target: GRIN1

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

KCNH2 Tclin HERG (29587 Activities)

Discover Target: KCNH2

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

CACNA1C Tclin Voltage-gated L-type calcium channel alpha-1C subunit (766 Activities)

Discover Target: CACNA1C

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

PDE3A Tclin Phosphodiesterase 3A (3309 Activities)

Discover Target: PDE3A

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

SLC29A1 Tclin Equilibrative nucleoside transporter 1 (1711 Activities)

Discover Target: SLC29A1

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

ADRA2B Tclin Alpha-2b adrenergic receptor (4412 Activities)

Discover Target: ADRA2B

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

ADRA2C Tclin Alpha-2c adrenergic receptor (4876 Activities)

Discover Target: ADRA2C

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

CHRM3 Tclin Muscarinic acetylcholine receptor M3 (7750 Activities)

Discover Target: CHRM3

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

HTR2B Tclin Serotonin 2b (5-HT2b) receptor (10323 Activities)

Discover Target: HTR2B

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

TBXA2R Tclin Thromboxane A2 receptor (5717 Activities)

Discover Target: TBXA2R

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

EDNRA Tclin Endothelin receptor ET-A (5008 Activities)

Discover Target: EDNRA

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

ADORA2A Tclin Adenosine A2a receptor (16305 Activities)

Discover Target: ADORA2A

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

ADORA3 Tchem Adenosine A3 receptor (15931 Activities)

Discover Target: ADORA3

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

BDKRB2 Tclin Bradykinin B2 receptor (3970 Activities)

Discover Target: BDKRB2

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

HRH3 Tclin Histamine H3 receptor (10389 Activities)

Discover Target: HRH3

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

CHRNA4 Tclin Neuronal acetylcholine receptor protein alpha-4 subunit (1265 Activities)

Discover Target: CHRNA4

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

Associated Targets(non-human)

Npy1r Neuropeptide Y receptor type 1 (8 Activities)

Discover Target: Npy1r

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

Cckar Cholecystokinin A receptor (90 Activities)

Discover Target: Cckar

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

Pde4d Phosphodiesterase 4D (4 Activities)

Discover Target: Pde4d

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

Mapk1 MAP kinase ERK2 (650 Activities)

Discover Target: Mapk1

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

Hdac6 Histone deacetylase 6 (222 Activities)

Discover Target: Hdac6

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

Pseudomonas aeruginosa (123386 Activities)

Explore this target

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

Klebsiella pneumoniae (43867 Activities)

Explore this target

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

Staphylococcus aureus (210822 Activities)

Explore this target

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

Acinetobacter baumannii (41033 Activities)

Explore this target

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

Escherichia coli (133304 Activities)

Explore this target

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

Cryptococcus neoformans (21258 Activities)

Explore this target

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

Candida albicans (78123 Activities)

Explore this target

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

rep Replicase polyprotein 1ab (378 Activities)

Discover Target: rep

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

Mechanisms of Action

Certificates（CoA,COO,BSE/TSE and Analysis Chart)

C of A & Other Certificates(BSE/TSE, COO):

Analytical Chart:

Find and download the COA for your product by matching the lot number on the packaging.

3 results found

Lot Number	Certificate Type	Date	Item
K2201763	Certificate of Analysis	May 11, 2026	P129379
K2201767	Certificate of Analysis	May 11, 2026	P129379
F1510079	Certificate of Analysis	Jan 20, 2023	P129379

Chemical and Physical Properties

Solubility	Soluble in water (37.8 g/L), methanol (13.8 g/L), ethanol (4.4 g/L), and DMF (72.4 g/L).
Specific Rotation[α]	-136° (C=2,5mol/L HCl)
Melt Point(°C)	196-198°C
Molecular Weight	244.270 g/mol
XLogP3	-0.700
Hydrogen Bond Donor Count	2
Hydrogen Bond Acceptor Count	5
Rotatable Bond Count	2
Exact Mass	244.052 Da
Monoisotopic Mass	244.052 Da
Topological Polar Surface Area	112.000 Å²
Heavy Atom Count	16
Formal Charge	0
Complexity	346.000
Isotope Atom Count	0
Defined Atom Stereocenter Count	2
Undefined Atom Stereocenter Count	0
Defined Bond Stereocenter Count	0
Undefined Bond Stereocenter Count	0
The total count of all stereochemical bonds	0
Covalently-Bonded Unit Count	1

Solution Calculators

Molarity Calculator

Determine the necessary mass, volume, or concentration for preparing a solution.

Dilution Calculator

Determine the dilution needed to prepare a stock solution.

Reconstitution Calculator

Reviews

Bulk & Custom Packaging Need larger quantities or custom specifications? Contact our team for a tailored quote.

Pidotimod - ≥98% , CAS No.121808-62-6

Why this grade

Storage & shipping

Quality documents

Literature proof

Overview

Specifications

Documentation

📋 Safety Data Sheet (SDS)

✅ Certificate of Analysis (COA)

📊 Datasheet

🔬 Specification Sheet

Advanced Data

Molarity Calculator

Dilution Calculator

Reconstitution Calculator

Customer Reviews

View related series