MK 1903 - ≥98%(HPLC) , CAS No.1268882-43-4

CAS: 1268882-43-4 Cat. No.: M286746 Molecular Weight: 164.16 EC Number: 892-109-2

COA

Skip to the end of the images gallery

MK 1903 - ≥98%(HPLC) CAS No(1268882-43-4) by Aladdin Scientific

Skip to the beginning of the images gallery

AVAILABLE TO ORDER

GRADE & PURITY ≥98%(HPLC)

Synonyms

(4aR,5aR)-4,4a,5,5a-Tetrahydro-1H-cyclopropa(4,5)cyclopenta(1,2-C)pyrazole-3-carboxylic acid | MK1903 | mk-1903 | rac-(2R,4R)-8,9-diazatricyclo[4.3.0.0,2,4]nona-1(6),7-diene-7-carboxylic acid | (1aR,5aR)-1a,3,5,5a-Tetrahydro-1H-2,3-diaza-cyclopropa[a]pent

Storage

Store at -20°C

Shipped In

Ice chest + Ice pads

Overview Specifications Names and Identifiers Documentation Advanced Data Taxonomic Classification 3D Structure Associated Targets(Human) Associated Targets(non-human) Mechanisms of Action Certificates（CoA,COO,BSE/TSE and Analysis Chart) Chemical and Physical Properties Solution Calculators Reviews

🧪

Why this grade

≥98%(HPLC) for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

🌡

Storage & shipping

Store at -20°C Ships Ice chest + Ice pads Check lot-specific COA for exact specifications.

📋

Quality documents

SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.

📚

Literature proof

Cited in 0 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Overview

Product description

MK-1903 is a potent and selective hydroxycarboxylic acid receptor 2 (HCA2, GPR109A) full agonist.

Specifications

Synonyms

(4aR, 5aR)-4, 4a, 5, 5a-Tetrahydro-1H-cyclopropa(4, 5)cyclopenta(1, 2-C)pyrazole-3-carboxylic acid | MK1903 | mk-1903 | rac-(2R, 4R)-8, 9-diazatricyclo[4.3.0.0, 2, 4]nona-1(6), 7-diene-7-carboxylic acid | (1aR, 5aR)-1a, 3, 5, 5a-Tetrahydro-1H-2, 3-diaza-cyclopropa[a]pent

Specifications & Purity

≥98%(HPLC)

Biochemical and Physiological Mechanisms

Potent and selective hydroxycarboxylic acid receptor 2 (HCA2, GPR109A) full agonist; exhibits greater potency than niacin in a whole cell HTRF-cAMP assay (EC50values are 12.9 and 51 nM respectively). Exhibits no binding at the GRP109B receptor.

Storage

Store at -20°C

Shipped In

Ice chest + Ice pads

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

Purity

≥98%(HPLC)

Names and Identifiers

Pubchem Sid	488201428
Pubchem Sid Url	https://pubchem.ncbi.nlm.nih.gov/substance/488201428
Canonical Smiles	C1C2C1C3=C(C2)C(=NN3)C(=O)O
IUPAC Name	(2R,4R)-8,9-diazatricyclo[4.3.0.02,4]nona-1(6),7-diene-7-carboxylic acid
InChIKey	CUTZNERBKDMLAP-QWWZWVQMSA-N
INCHI	1S/C8H8N2O2/c11-8(12)7-5-2-3-1-4(3)6(5)9-10-7/h3-4H,1-2H2,(H,9,10)(H,11,12)/t3-,4-/m1/s1
Isomeric SMILES	C1[C@H]2[C@@H]1C3=C(C2)C(=NN3)C(=O)O
Molecular Weight	164.16
Reaxy-Rn	26156047
Reaxys-RN_link_address	https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=26156047&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 Organoheterocyclic compounds
  - Class Azoles
    - Subclass Pyrazoles

Kingdom	Organic compounds
Superclass	Organoheterocyclic compounds
Class	Azoles
Subclass	Pyrazoles
Intermediate Tree Nodes	Not available
Direct Parent	Pyrazole carboxylic acids and derivatives
Alternative Parents	Heteroaromatic compounds Carboxylic acids Azacyclic compounds Organooxygen compounds Organonitrogen compounds Organic oxides Hydrocarbon derivatives
Molecular Framework	Aromatic heteropolycyclic compounds
Substituents	Pyrazole-3-carboxylic acid or derivatives - Pyrazole-5-carboxylic acid or derivatives - Heteroaromatic compound - Azacycle - Carboxylic acid - Carboxylic acid derivative - Organic nitrogen compound - Organic oxygen compound - Organic oxide - Hydrocarbon derivative - Organooxygen compound - Organonitrogen compound - Aromatic heteropolycyclic compound
Description	This compound belongs to the class of organic compounds known as pyrazole carboxylic acids and derivatives. These are heterocyclic compounds containing a pyrazole ring in which a hydrogen atom is replaced by a carboxylic acid group.
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)

HCAR2 Tclin Hydroxycarboxylic acid receptor 2 (1 Activities)

Discover Target: HCAR2

Activity Type	Activity Value -log(M)	Mechanism of Action	Activity Reference	Publications (PubMed IDs)

ABL1 Tclin Tyrosine-protein kinase ABL (18331 Activities)

Discover Target: ABL1

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

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

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

CYP2C8 Tchem Cytochrome P450 2C8 (1492 Activities)

Discover Target: CYP2C8

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

GSK3B Tclin Glycogen synthase kinase-3 beta (11785 Activities)

Discover Target: GSK3B

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

CSNK1D Tchem Casein kinase I delta (4546 Activities)

Discover Target: CSNK1D

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

CYP2D6 Tclin Cytochrome P450 2D6 (33882 Activities)

Discover Target: CYP2D6

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

S1PR1 Tclin Sphingosine 1-phosphate receptor Edg-1 (5806 Activities)

Discover Target: S1PR1

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

CDK2 Tchem Cyclin-dependent kinase 2 (9050 Activities)

Discover Target: CDK2

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

GLP1R Tclin Glucagon-like peptide 1 receptor (111429 Activities)

Discover Target: GLP1R

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

C5AR1 Tclin C5a anaphylatoxin chemotactic receptor (2677 Activities)

Discover Target: C5AR1

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

CYP2C9 Tchem Cytochrome P450 2C9 (32119 Activities)

Discover Target: CYP2C9

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

CYP3A4 Tclin Cytochrome P450 3A4 (53859 Activities)

Discover Target: CYP3A4

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

AURKA Tchem Serine/threonine-protein kinase Aurora-A (10240 Activities)

Discover Target: AURKA

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

Homo sapiens (32628 Activities)

Explore this target

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

U2OS (164939 Activities)

Explore this target

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

CX3CR1 Tchem C-X3-C chemokine receptor 1 (1686 Activities)

Discover Target: CX3CR1

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

FPR2 Tchem Lipoxin A4 receptor (3472 Activities)

Discover Target: FPR2

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

HCAR3 Tchem HM74 nicotinic acid GPCR (353 Activities)

Discover Target: HCAR3

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

FFAR4 Tchem G-protein coupled receptor 120 (2999 Activities)

Discover Target: FFAR4

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

BRD4 Tchem Bromodomain-containing protein 4 (13122 Activities)

Discover Target: BRD4

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

GPR35 Tchem G-protein coupled receptor 35 (2643 Activities)

Discover Target: GPR35

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

TRIM24 Tchem Transcription intermediary factor 1-alpha (2087 Activities)

Discover Target: TRIM24

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

BRPF1 Tchem Peregrin (2217 Activities)

Discover Target: BRPF1

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

HEK-293T (167025 Activities)

Explore this target

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

Associated Targets(non-human)

Aplnr Apelin receptor (201 Activities)

Discover Target: Aplnr

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

Fgfr3 Fibroblast growth factor receptor 3 (21 Activities)

Discover Target: Fgfr3

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

Hcar2 Hydroxycarboxylic acid receptor 2 (55 Activities)

Discover Target: Hcar2

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

Canis familiaris (36305 Activities)

Explore this target

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

Mus musculus (284745 Activities)

Explore this target

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

Rattus norvegicus (775804 Activities)

Explore this target

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

Rhesus monkey (3147 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

Gpr119 Glucose-dependent insulinotropic receptor (270 Activities)

Discover Target: Gpr119

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

SARS-CoV-2 (38078 Activities)

Explore this target

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.

8 results found

Lot Number	Certificate Type	Date	Item
D23181382	Certificate of Analysis	Feb 04, 2026	M286746
D23181394	Certificate of Analysis	Feb 04, 2026	M286746
D23181407	Certificate of Analysis	Feb 04, 2026	M286746
D23181414	Certificate of Analysis	Feb 04, 2026	M286746
D23181415	Certificate of Analysis	Feb 04, 2026	M286746
D23181434	Certificate of Analysis	Feb 04, 2026	M286746
D23181436	Certificate of Analysis	Feb 04, 2026	M286746
D23181468	Certificate of Analysis	Feb 04, 2026	M286746

Chemical and Physical Properties

Solubility	Solvent:DMSO, Max Conc. mg/mL: 16.42, Max Conc. mM: 100; Solvent:ethanol, Max Conc. mg/mL: 8.21, Max Conc. mM: 50
Molecular Weight	164.160 g/mol
XLogP3	0.600
Hydrogen Bond Donor Count	2
Hydrogen Bond Acceptor Count	3
Rotatable Bond Count	1
Exact Mass	164.059 Da
Monoisotopic Mass	164.059 Da
Topological Polar Surface Area	66.000 Å²
Heavy Atom Count	12
Formal Charge	0
Complexity	243.000
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.

MK 1903 - ≥98%(HPLC) , CAS No.1268882-43-4

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