Ko 143 - Moligand™, ≥98% , Inhibitor of ABCG2, CAS No.461054-93-3, Inhibitor of ABCG2

CAS: 461054-93-3 Cat. No.: K120134 Molecular Weight: 469.57 (anhydrous basis) EC Number: 687-385-4

GRADE & PURITY Moligand™, ≥98%

Synonyms

(3s,6s,12as)-1,2,3,4,6,7,12,12a-octahydro-9-methoxy-6-(2-methylpropyl) 1,4-dioxopyrazino [1',2':1,6]pyrido[3,4-b]indole-3-propanoic acid 1,1-dimethylethyl ester | Ko143 | Ko-143 | 3-((3S,6S,12aS)-6-Isobutyl-9-methoxy-1,4-dioxo-1,2,3,4,6,7,12,12a-octahydro

Storage

Store at -20°C

Shipped In

Ice chest + Ice pads

Overview

Ko 143 is a potent and selective breast cancer resistance protein multidrug transporter (BCRP) inhibitor (EC90 = 26 nM), Ko 143 displays > 200-fold selectivity over P-gp and MRP-1 transporters.
A selective BCRP multidrug transporter inhibitor

Specifications

Synonyms

(3s, 6s, 12as)-1, 2, 3, 4, 6, 7, 12, 12a-octahydro-9-methoxy-6-(2-methylpropyl) 1, 4-dioxopyrazino [1', 2':1, 6]pyrido[3, 4-b]indole-3-propanoic acid 1, 1-dimethylethyl ester | Ko143 | Ko-143 | 3-((3S, 6S, 12aS)-6-Isobutyl-9-methoxy-1, 4-dioxo-1, 2, 3, 4, 6, 7, 12, 12a-octahydro

Specifications & Purity

Moligand™, ≥98%

Biochemical and Physiological Mechanisms

Ko 143 is a potent and selective ABCG2 (breast cancer resistance protein multidrug transporter, BCRP) inhibitor (EC90 = 26 nM). It displays > 200-fold selectivity over P-gp and MRP-1 transporters. Ko 143 also increases intracellular drug accumulation and

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.

Grade

Moligand™

Action Type

INHIBITOR

Mechanism of action

Inhibitor of ABCG2

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: 504765394
• Pubchem Sid Url: https://pubchem.ncbi.nlm.nih.gov/substance/504765394
• Canonical Smiles: CC(C)CC1C2=C(CC3N1C(=O)C(NC3=O)CCC(=O)OC(C)(C)C)C4=C(N2)C=C(C=C4)OC
• IUPAC Name: tert-butyl 3-[(2S,5S,8S)-14-methoxy-2-(2-methylpropyl)-4,7-dioxo-3,6,17-triazatetracyclo[8.7.0.03,8.011,16]heptadeca-1(10),11,13,15-tetraen-5-yl]propanoate
• InChIKey: NXNRAECHCJZNRF-JBACZVJFSA-N
• INCHI: 1S/C26H35N3O5/c1-14(2)11-20-23-17(16-8-7-15(33-6)12-19(16)27-23)13-21-24(31)28-18(25(32)29(20)21)9-10-22(30)34-26(3,4)5/h7-8,12,14,18,20-21,27H,9-11,13H2,1-6H3,(H,28,31)/t18-,20-,21-/m0/s1
• Isomeric SMILES: CC(C)C[C@H]1C2=C(C[C@@H]3N1C(=O)[C@@H](NC3=O)CCC(=O)OC(C)(C)C)C4=C(N2)C=C(C=C4)OC
• WGK Germany: 3
• Molecular Weight: 469.57 (anhydrous basis)
• Reaxy-Rn: 11166757
• Reaxys-RN_link_address: https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=11166757&ln=

Taxonomic Classification

Taxonomy Tree

• Kingdom Organic compounds
  • Superclass Organoheterocyclic compounds
    • Class Indoles and derivatives
      • Subclass Pyridoindoles

• Kingdom: Organic compounds
• Superclass: Organoheterocyclic compounds
• Class: Indoles and derivatives
• Subclass: Pyridoindoles
• Intermediate Tree Nodes: Not available
• Direct Parent: Beta carbolines
• Alternative Parents: 3-alkylindoles Alpha amino acids and derivatives 2,5-dioxopiperazines Anisoles Alkyl aryl ethers N-alkylpiperazines Fatty acid esters Tertiary carboxylic acid amides Pyrroles Heteroaromatic compounds Secondary carboxylic acid amides Lactams Carboxylic acid esters Monocarboxylic acids and derivatives Azacyclic compounds Carbonyl compounds Hydrocarbon derivatives Organic oxides Organonitrogen compounds Organopnictogen compounds
• Molecular Framework: Aromatic heteropolycyclic compounds
• Substituents: Beta-carboline - Alpha-amino acid or derivatives - 3-alkylindole - Indole - Anisole - Dioxopiperazine - 2,5-dioxopiperazine - Alkyl aryl ether - Fatty acid ester - N-alkylpiperazine - 1,4-diazinane - Piperazine - Fatty acyl - Benzenoid - Tertiary carboxylic acid amide - Pyrrole - Heteroaromatic compound - Carboxamide group - Carboxylic acid ester - Secondary carboxylic acid amide - Lactam - Ether - Azacycle - Carboxylic acid derivative - Monocarboxylic acid or derivatives - Organopnictogen compound - Hydrocarbon derivative - Organic oxygen compound - Organic nitrogen compound - Carbonyl group - Organic oxide - Organooxygen compound - Organonitrogen compound - Aromatic heteropolycyclic compound
• Description: This compound belongs to the class of organic compounds known as beta carbolines. These are compounds containing a 9H-pyrido[3,4-b]indole moiety.
• 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)

ABCB1 Tchem Multidrug resistance protein 1 (3 Activities)

Discover Target: ABCB1

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

ABCG2 Tchem ATP-binding cassette sub-family G member 2 (50 Activities)

Discover Target: ABCG2

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

K562 (73714 Activities)

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

MCF7 (126967 Activities)

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

A549 (127892 Activities)

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HEK293 (82097 Activities)

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

NCI-H460 (60772 Activities)

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

ABCG2 Tchem ATP-binding cassette sub-family G member 2 (4927 Activities)

Discover Target: ABCG2

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

ABCC2 Tchem Canalicular multispecific organic anion transporter 1 (1191 Activities)

Discover Target: ABCC2

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

SLCO1B1 Tchem Solute carrier organic anion transporter family member 1B1 (2672 Activities)

Discover Target: SLCO1B1

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

SLCO1B3 Tchem Solute carrier organic anion transporter family member 1B3 (2517 Activities)

Discover Target: SLCO1B3

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

SLCO2B1 Tchem Solute carrier organic anion transporter family member 2B1 (580 Activities)

Discover Target: SLCO2B1

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

HFF-1 (186 Activities)

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

K562/A02 (383 Activities)

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

Associated Targets(non-human)

Abcc1 Multidrug resistance-associated protein 1 (42 Activities)

Discover Target: Abcc1

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

Abcb1b P-glycoprotein 1 (174 Activities)

Discover Target: Abcb1b

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

Rattus norvegicus (775804 Activities)

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MDCK (10148 Activities)

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

NIH3T3 (5395 Activities)

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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

MDCK-II (565 Activities)

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Mechanisms of Action

Chemical and Physical Properties

• Solubility: DMSO: >10 mg/mL
• Refractive Index: 1.6
• Boil Point(°C): ~689.8° C at 760 mmHg
• Melt Point(°C): 294.92°C
• Molecular Weight: 469.600 g/mol
• XLogP3: 3.500
• Hydrogen Bond Donor Count: 2
• Hydrogen Bond Acceptor Count: 5
• Rotatable Bond Count: 8
• Exact Mass: 469.258 Da
• Monoisotopic Mass: 469.258 Da
• Topological Polar Surface Area: 101.000 Ų
• Heavy Atom Count: 34
• Formal Charge: 0
• Complexity: 794.000
• Isotope Atom Count: 0
• Defined Atom Stereocenter Count: 3
• 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. Yanghui Chen, Yuan Li, Junliang Luo, Zixin Li, Yu Huang, Jia Cai, Dongneng Jiang, Defeng Zhang, Jichang Jian, Jun Qiang, Bei Wang.  (2024)  A novel study of brain microvascular endothelial cells induced by astrocyte conditioned medium for constructing blood brain barrier model in vitro: A promising tool for meningitis of teleost.  FISH & SHELLFISH IMMUNOLOGY,      [PMID:38266792] [10.1016/j.fsi.2024.109401]

2. Rui Li, Wenhui Ruan, Rui Hao, Jue Chen, Chu Xu, Liyan Lu, Yingli Wang.  (2025)  O-carboxymethyl chitosan-grafted-cholesterol succinic acid monoester nanomicelles improve oral absorption of cannabidiol: Preparation, intestinal absorption in vitro, and pharmacokinetics in vivo.  JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY,      [PMID:] [10.1016/j.jddst.2025.106763]

3. Wenqing Sun, Yufeng Xu, Zhiqin Liu, Wei Liu, Hongting Wang, Guanyu Chang, Zihui Yang, Zhen Dong, Jianguo Zeng.  (2024)  Studies on pharmacokinetic properties and intestinal absorption mechanism of sanguinarine chloride: in vivo and in situ.  TOXICOLOGY MECHANISMS AND METHODS,      [PMID:39087424] [10.1080/15376516.2024.2383366]

4. Simin Zhao, Jiao Zhang, Yuting Huang, Yanan Yuan, Ting Wu, Siyi Pan, Xiaoyun Xu.  (2026)  Transepithelial Transport of Caffeoylquinic Acids in Caco-2 Cells: Structure Dependence and Modulation by Dietary Flavonoids.  Foods,  15  (4): (642).  [PMID:41750834] [10.3390/foods15040642]