BLU-451   Click here for help

GtoPdb Ligand ID: 13064

Synonyms: BLU451 | compound I [WO2023215431A1] [3] | Example 37 [WO2022094354A1] [4] | LNG-451 | LNG451
Compound class: Synthetic organic
Comment: Although the name-to-structure for BLU-451 has not been formally published, a focussed review of patents [3-4], declared company pipelines (Blueprint Medicines [1]), published literature, meeting abstracts [6] and other online information leads us to consider the chemical structure presented here as a very strong candidate for BLU-451.

BLU-451 (formerly LNG-451) is a wild-type EGFR-sparing, CNS-penetrant and covalent EGFR Exon 20 insertion (Ex20ins) inhibitor that is in development for anti‑tumour potential, particularly for non-small cell lung cancers that express variant EGFRs with Exon 20 insertions (i.e., resistance mutations) [2,5]. The Ex20ins-targeting drugs amivantamab and mobocertinib are already in clinical use, but their activity within the brain has not been established. Minimising activity at WT EGFRs is propsed to reduce on-target toxicity.
2D Structure
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2D Structure

An image of the ligand's 2D structure. For small molecules with SMILES these are drawn using the NCI/CADD Chemical Identifier Resolver. Click on the image to access the chemical structure search tool with the ligand pre-loaded in the structure editor. For other types of ligands, e.g. longer nucleotides and peptides, a manually drawn representation of the molecule may be provided.

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Physico-chemical Properties
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Physico-chemical Properties

Calculated molecular properties are available for small molecules and natural products (not peptides). Properties were generated using the CDK toolkit. All properties were selected to enable the prediction of the Lipinski Rule-of-Five profile or ‘druglikeness’ for each ligand. For more info on each category see the help pages.

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Hydrogen bond acceptors 8
Hydrogen bond donors 3
Rotatable bonds 9
Topological polar surface area 93.48
Molecular weight 497.45
XLogP 2.21
No. Lipinski's rules broken 0
SMILES / InChI / InChIKey
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SMILES / InChI / InChIKey

SMILES (Simplified Molecular Input Line Entry Specification) A specification for unambiguously describing the structure of chemical molecules using short ASCII strings. Canonical SMILES specify a unique representation of the 2D structure without chiral or isotopic specifications. Isomeric SMILES include chiral specification and isotopes.

Standard InChI (IUPAC International Chemical Identifier) and InChIKey InChI is a non-proprietary, standard, textual identifier for chemical substances designed to facilitate linking of information and database searching. An InChIKey is a simplified version of a full InChI, designed for easier web searching.

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Canonical SMILES C=CC(=O)NC1=CC=C(C(=C1)NC2=C(C=NC(=N2)NC3=CN(C)N=C3)C4=CC=C(C=C4)C(F)(F)F)F
Isomeric SMILES CN1C=C(NC2=NC=C(C(NC3=C(F)C=CC(NC(=O)C=C)=C3)=N2)C4=CC=C(C=C4)C(F)(F)F)C=N1
InChI InChI=1S/C24H19F4N7O/c1-3-21(36)31-16-8-9-19(25)20(10-16)33-22-18(14-4-6-15(7-5-14)24(26,27)28)12-29-23(34-22)32-17-11-30-35(2)13-17/h3-13H,1H2,2H3,(H,31,36)(H2,29,32,33,34)
InChI Key XIMJCWSFLXXQMZ-UHFFFAOYSA-N
Bioactivity Comments
In vitro BLU-451/LNG-451 acts as a potent inhibitor of prevalent Ex20 insertion EGFRs, with IC50s of 78 nM, 75 nM and 53 nM for the V769_D770insASV, H773_V774insNPH and D770_N771insSVD variants respectively, with low potency in WT EGFR dependent cell assays [6]. It also inhibits growth of cells that are dependent on EGFRs with uncommon resistance point mutations (L861Q, G719S, G719S/T263P).