SB431542 - Moligand™, ≥98% , Inhibitor of activin A receptor type 1C;Inhibitor of transforming growth factor beta receptor 1, CAS No.301836-41-9, Inhibitor of activin A receptor type 1C;Inhibitor of transforming growth factor beta receptor 1

CAS: 301836-41-9 Cat. No.: S125924 Molecular Weight: 384.39 EC Number: 188-365-3

GRADE & PURITY Moligand™, ≥98%

Synonyms

4-(4-(benzo[d][1,3]dioxol-5-yl)-5-(pyridin-2-yl)-1H-imidazol-2-yl)benzamide | 4-[4-(1,3-BENZODIOXOL-5-YL)-5-(2-PYRIDINYL)-1H-IMIDAZOL-2-YL]BENZAMIDE | SB431542 | SB-431542 | 4-[4-(1,3-benzodioxol-5-yl)-5-pyridin-2-yl-1H-imidazol-2-yl]benzamide | SB 431542

Storage

Protected from light,Store at -20°C

Shipped In

Ice chest + Ice pads

Overview

SB431542 is a potent and selective inhibitor of ALK5 with IC50 of 94 nM in a cell-free assay, 100-fold more selective for ALK5 than p38 MAPK and other kinases.
A specific and selective inhibitor of TGF-β type I ALK receptors and Smad3.

Specifications

Synonyms

4-(4-(benzo[d][1, 3]dioxol-5-yl)-5-(pyridin-2-yl)-1H-imidazol-2-yl)benzamide | 4-[4-(1, 3-BENZODIOXOL-5-YL)-5-(2-PYRIDINYL)-1H-IMIDAZOL-2-YL]BENZAMIDE | SB431542 | SB-431542 | 4-[4-(1, 3-benzodioxol-5-yl)-5-pyridin-2-yl-1H-imidazol-2-yl]benzamide | SB 431542

Specifications & Purity

Moligand™, ≥98%

Biochemical and Physiological Mechanisms

SB 431542 is a small molecule that acts as a specific and selective inhibitor of TGFβ RI, ACTR-IB and ACTR-IC (transforming growth factor-β superfamily type I activin receptor-like kinase (ALK) receptors ALK4, 5, and 7). Renal carcinoma studies have demon

Storage

Protected from light, Store at -20°C

Shipped In

Ice chest + Ice pads

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

Grade

Moligand™

Action Type

INHIBITOR

Mechanism of action

Inhibitor of activin A receptor type 1C;Inhibitor of transforming growth factor beta receptor 1

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

• Canonical Smiles: C1OC2=C(O1)C=C(C=C2)C3=C(NC(=N3)C4=CC=C(C=C4)C(=O)N)C5=CC=CC=N5
• IUPAC Name: 4-[4-(1,3-benzodioxol-5-yl)-5-pyridin-2-yl-1H-imidazol-2-yl]benzamide
• InChIKey: FHYUGAJXYORMHI-UHFFFAOYSA-N
• INCHI: 1S/C22H16N4O3/c23-21(27)13-4-6-14(7-5-13)22-25-19(20(26-22)16-3-1-2-10-24-16)15-8-9-17-18(11-15)29-12-28-17/h1-11H,12H2,(H2,23,27)(H,25,26)
• Isomeric SMILES: C1OC2=C(O1)C=C(C=C2)C3=C(NC(=N3)C4=CC=C(C=C4)C(=O)N)C5=CC=CC=N5
• Molecular Weight: 384.39

Taxonomic Classification

Taxonomy Tree

• Kingdom Organic compounds
  • Superclass Organoheterocyclic compounds
    • Class Azoles
      • Subclass Imidazoles
        • Level5 Substituted imidazoles
          • Level6 Phenylimidazoles

• Kingdom: Organic compounds
• Superclass: Organoheterocyclic compounds
• Class: Azoles
• Subclass: Imidazoles
• Intermediate Tree Nodes: Substituted imidazoles
• Direct Parent: Phenylimidazoles
• Alternative Parents: Benzodioxoles Benzamides Benzoyl derivatives 2,4,5-trisubstituted imidazoles Pyridines and derivatives Heteroaromatic compounds Primary carboxylic acid amides Oxacyclic compounds Azacyclic compounds Acetals Organopnictogen compounds Organonitrogen compounds Organic oxides Hydrocarbon derivatives
• Molecular Framework: Aromatic heteropolycyclic compounds
• Substituents: 2-phenylimidazole - Benzamide - Benzodioxole - Benzoic acid or derivatives - 2,4,5-trisubstituted-imidazole - Benzoyl - Trisubstituted imidazole - Monocyclic benzene moiety - Benzenoid - Pyridine - Heteroaromatic compound - Primary carboxylic acid amide - Carboxamide group - Oxacycle - Acetal - Azacycle - Carboxylic acid derivative - Organic oxide - Organopnictogen compound - Organic oxygen compound - Organic nitrogen compound - Hydrocarbon derivative - Organonitrogen compound - Organooxygen compound - Aromatic heteropolycyclic compound
• Description: This compound belongs to the class of organic compounds known as phenylimidazoles. These are polycyclic aromatic compounds containing a benzene ring linked to an imidazole ring through a CC or CN bond.
• External Descriptors: Not available

Data sources

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

Associated Targets(Human)

TGFBR1 Tchem TGF-beta receptor type-1 (2 Activities)

Discover Target: TGFBR1

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

ACVR1C Tbio Activin receptor type-1C (0 Activities)

Discover Target: ACVR1C

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

EGFR Tclin Epidermal growth factor receptor erbB1 (33727 Activities)

Discover Target: EGFR

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

INSR Tclin Insulin receptor (5558 Activities)

Discover Target: INSR

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

ERBB2 Tclin Receptor protein-tyrosine kinase erbB-2 (7851 Activities)

Discover Target: ERBB2

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

PDGFRB Tclin Platelet-derived growth factor receptor beta (5195 Activities)

Discover Target: PDGFRB

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

IGF1R Tclin Insulin-like growth factor I receptor (8605 Activities)

Discover Target: IGF1R

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

KIT Tclin Stem cell growth factor receptor (10667 Activities)

Discover Target: KIT

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

TUBA4A Tchem Tubulin alpha-1 chain (1 Activities)

Discover Target: TUBA4A

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

CSNK2A1 Tchem Casein kinase II alpha (3512 Activities)

Discover Target: CSNK2A1

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

DAPK3 Tchem Death-associated protein kinase 3 (2108 Activities)

Discover Target: DAPK3

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

MAPK11 Tchem MAP kinase p38 beta (2785 Activities)

Discover Target: MAPK11

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

LCK Tclin Tyrosine-protein kinase LCK (9212 Activities)

Discover Target: LCK

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

MAPK14 Tchem MAP kinase p38 alpha (12866 Activities)

Discover Target: MAPK14

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

PRKACB Tchem cAMP-dependent protein kinase beta-1 catalytic subunit (589 Activities)

Discover Target: PRKACB

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

MAP2K6 Tchem Dual specificity mitogen-activated protein kinase kinase 6 (1284 Activities)

Discover Target: MAP2K6

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

MYLK Tchem Myosin light chain kinase, smooth muscle (1267 Activities)

Discover Target: MYLK

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

CSNK1G1 Tchem Casein kinase I gamma 1 (2496 Activities)

Discover Target: CSNK1G1

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

FGFR2 Tclin Fibroblast growth factor receptor 2 (3405 Activities)

Discover Target: FGFR2

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

FGFR1 Tclin Fibroblast growth factor receptor 1 (9149 Activities)

Discover Target: FGFR1

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

STK3 Tchem Serine/threonine-protein kinase MST2 (3069 Activities)

Discover Target: STK3

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

CAMK2B Tchem CaM kinase II beta (1626 Activities)

Discover Target: CAMK2B

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

SRC Tclin Tyrosine-protein kinase SRC (10310 Activities)

Discover Target: SRC

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

MAP2K3 Tchem Dual specificity mitogen-activated protein kinase kinase 3 (632 Activities)

Discover Target: MAP2K3

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

PDPK1 Tchem 3-phosphoinositide dependent protein kinase-1 (3758 Activities)

Discover Target: PDPK1

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

PRKAA2 Tchem AMP-activated protein kinase, alpha-2 subunit (1328 Activities)

Discover Target: PRKAA2

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

AKT2 Tchem Serine/threonine-protein kinase AKT2 (4301 Activities)

Discover Target: AKT2

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

AKT3 Tchem Serine/threonine-protein kinase AKT3 (3157 Activities)

Discover Target: AKT3

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

DAPK2 Tchem Death-associated protein kinase 2 (740 Activities)

Discover Target: DAPK2

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

AURKB Tchem Serine/threonine-protein kinase Aurora-B (6805 Activities)

Discover Target: AURKB

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

RPS6KA4 Tchem Ribosomal protein S6 kinase alpha 4 (2104 Activities)

Discover Target: RPS6KA4

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

ROCK1 Tclin Rho-associated protein kinase 1 (4723 Activities)

Discover Target: ROCK1

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

PIM1 Tchem Serine/threonine-protein kinase PIM1 (9629 Activities)

Discover Target: PIM1

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

PKN2 Tchem Protein kinase N2 (1991 Activities)

Discover Target: PKN2

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

CSK Tchem Tyrosine-protein kinase CSK (2395 Activities)

Discover Target: CSK

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

JAK3 Tclin Tyrosine-protein kinase JAK3 (8349 Activities)

Discover Target: JAK3

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

RPS6KA5 Tchem Ribosomal protein S6 kinase alpha 5 (3355 Activities)

Discover Target: RPS6KA5

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

PRKCE Tchem Protein kinase C epsilon (1520 Activities)

Discover Target: PRKCE

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

PRKD3 Tchem Protein kinase C nu (2315 Activities)

Discover Target: PRKD3

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

PRKD1 Tchem Protein kinase C mu (1904 Activities)

Discover Target: PRKD1

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

RAF1 Tclin Serine/threonine-protein kinase RAF (4169 Activities)

Discover Target: RAF1

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

SYK Tclin Tyrosine-protein kinase SYK (7372 Activities)

Discover Target: SYK

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

PLK1 Tchem Serine/threonine-protein kinase PLK1 (28605 Activities)

Discover Target: PLK1

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

ITK Tclin Tyrosine-protein kinase ITK/TSK (3699 Activities)

Discover Target: ITK

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

JAK1 Tclin Tyrosine-protein kinase JAK1 (8569 Activities)

Discover Target: JAK1

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

RPS6KA1 Tchem Ribosomal protein S6 kinase alpha 1 (2796 Activities)

Discover Target: RPS6KA1

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

JAK2 Tclin Tyrosine-protein kinase JAK2 (12915 Activities)

Discover Target: JAK2

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

RPS6KA6 Tchem Ribosomal protein S6 kinase alpha 6 (2027 Activities)

Discover Target: RPS6KA6

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

ALOX15B Tchem Arachidonate 15-lipoxygenase, type II (7244 Activities)

Discover Target: ALOX15B

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

Associated Targets(non-human)

PIK3CA PI3-kinase p110-alpha subunit (51 Activities)

Discover Target: PIK3CA

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

Prkcd Protein kinase C delta (192 Activities)

Discover Target: Prkcd

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

Fgfr4 Fibroblast growth factor receptor 4 (138 Activities)

Discover Target: Fgfr4

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

Camk2g CaM kinase II gamma (1 Activities)

Discover Target: Camk2g

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

Tec Tyrosine-protein kinase TEC (25 Activities)

Discover Target: Tec

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

Trypanosoma cruzi (99888 Activities)

Explore this target

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

Schistosoma mansoni (6170 Activities)

Explore this target

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

lef Anthrax lethal factor (7585 Activities)

Discover Target: lef

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

GCN5 Histone acetyltransferase GCN5 (89 Activities)

Discover Target: GCN5

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

Luciferin 4-monooxygenase (66902 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

Mapt Microtubule-associated protein tau (6 Activities)

Discover Target: Mapt

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

Impa1 Inositol monophosphatase 1 (16203 Activities)

Discover Target: Impa1

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

Tgfbr1 TGF-beta receptor type-1 (52 Activities)

Discover Target: Tgfbr1

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

Chemical and Physical Properties

• Solubility: Soluble in DMSO (77 mg/ml at 25 °C), ethanol (45 mg/ml at 25 °C), DMF (~20 mg/ml), DMSO:PBS (pH 7.2) (1:1) (~ 0.5 mg/ml), and water (<1 mg/ml at 25 °C).
• Sensitivity: Heat sensitive；light sensitive
• Melt Point(°C): 214 °C(dec.)
• Molecular Weight: 384.400 g/mol
• XLogP3: 2.700
• Hydrogen Bond Donor Count: 2
• Hydrogen Bond Acceptor Count: 5
• Rotatable Bond Count: 4
• Exact Mass: 384.122 Da
• Monoisotopic Mass: 384.122 Da
• Topological Polar Surface Area: 103.000 Ų
• Heavy Atom Count: 29
• Formal Charge: 0
• Complexity: 582.000
• Isotope Atom Count: 0
• Defined Atom Stereocenter Count: 0
• 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

References

1. Jinyue Zhu, Weiqing Wang, Xia Wu.  (2019)  Isorhynchophylline exerts anti-asthma effects in mice by inhibiting the proliferation of airway smooth muscle cells: The involvement of miR-200a-mediated FOXC1/NF-κB pathway.  BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS,      [PMID:31733831] [10.1016/j.bbrc.2019.10.178]

2. Meng Wang, Hui Li, Yaxin Zhao, Chuanfeng Lv, Guanghua Zhou.  (2018)  Rhynchophylline attenuates allergic bronchial asthma by inhibiting transforming growth factor‑β1‑mediated Smad and mitogen‑activated protein kinase signaling transductions in vivo and in vitro.  Experimental and Therapeutic Medicine,  17  (1): (251-259).  [PMID:30651790] [10.3892/etm.2018.6909]

3. Huan Chen, Jin Liu, Jia Zhang, Yuqian Chen, Yan Wang, Yuanjie Qiu, Huizhong Hu, Limin Chai, Qianqian Zhang, Qingting Wang, Manxiang Li.  (2025)  USP22/BRD4 mediated hedgehog pathway activation contributes to airway remodeling in asthma.  INTERNATIONAL IMMUNOPHARMACOLOGY,      [PMID:40132456] [10.1016/j.intimp.2025.114538]