SML2718

GSK503

≥98% (HPLC)

• Synonym(s): GSK 503, GSK-503, N-((4,6-Dimethyl-2-oxo-1,2-dihydropyridin-3-yl)methyl)-1-isopropyl-3-methyl-6-(6-(4-methylpiperazin-1-yl)pyridin-3-yl)-1H-indole-4-carboxamide, N-[(1,2-Dihydro-4,6-dimethyl-2-oxo-3-pyridinyl)methyl]-3-methyl-1-(1-methylethyl)-6-[6-(4-methyl-1-piperazinyl)-3-pyridinyl]-1H-indole-4-carboxamide
• Empirical Formula (Hill Notation): C₃₁H₃₈N₆O₂
• CAS Number: 1346572-63-1
• Molecular Weight: 526.67
• MDL number: MFCD28405142
• UNSPSC Code: 12352200
• NACRES: NA.77

Properties

• Quality Level: 100
• Assay: ≥98% (HPLC)
• form: powder
• color: white to beige
• solubility: DMSO: 2 mg/mL, clear
• storage temp.: 2-8°C
• SMILES string: [nH]1[c](c(c(cc1C)C)CNC(=O)c2c3c([n](cc3C)C(C)C)cc(c2)c4cnc(cc4)N5CCN(CC5)C)=O
• InChI: 1S/C31H38N6O2/c1-19(2)37-18-21(4)29-25(30(38)33-17-26-20(3)13-22(5)34-31(26)39)14-24(15-27(29)37)23-7-8-28(32-16-23)36-11-9-35(6)10-12-36/h7-8,13-16,18-19H,9-12,17H2,1-6H3,(H,33,38)(H,34,39)
• InChI key: HRDQQHUKUIKFHT-UHFFFAOYSA-N

Description

Biochem/physiol Actions

GSK503 is a potent and selective histone-lysine N-methyltransferase EZH2 (ENX1, KMT6) inhibitor (IC₅₀/K_i^app = 8/3 nM/EZH2, 27 nM/Y641C, <5 nM/A677G, Y641F/H/N/S EZH2 mutants vs. 633/636 nM/EZH1) with >4,000-fold selectivity over other histone methyltransferases and little potency toward panels of histone acetylases/deacetylases, kinases, GPCR/channels/transporters. GSK503 reduces splenocyte H3K27me3 level and prevents post immunization germinal center (GC) formation (150 mg/kg/day i.p.; mice) with good pharmacokinetics in vivo. GSK503 abrogates the GC hyperplasia phenotype of Ezh2(Y641N) mice and suppresses human DLBCL xenografts tumor growth in mice.

Potent and selective histone-lysine N-methyltransferase EZH2 (ENX1, KMT6) inhibitor in vitro and in vivo. Displays >200-fold selectivity over EZH1.

Safety Information

• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable