lasmotinib   Click here for help

GtoPdb Ligand ID: 13746

Synonyms: PHI-101 | PHI101
Compound class: Synthetic organic
Comment: Lasmotinib is the INN for a tyrosine kinase inhibitor. A structure match in PubChem linked the INN to the company research code PHI-101 (Pharos iBio). PHI-101 has been reported as a FMS-like tyrosine kinase 3 (FLT3) inhibitor [1] and as a checkpoint kinase 2 (Chk2) inhibitor [2], and both of these mechanisms are confirmed by information presented on Pharos iBio's development pipeline page [3]. PHI-101 is proposed for the treatment of various types of cancer. At the time of writing (Feb 2025) the chemical structure of PHI-101 had not been formally disclosed.
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 Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/). 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 6
Hydrogen bond donors 4
Rotatable bonds 5
Topological polar surface area 121.55
Molecular weight 386.44
XLogP 1.04
No. Lipinski's rules broken 0

Generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/)
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.

Generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/)

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Canonical SMILES C1=CC(=CC(=C1)C#CC2=CC(=C(C(=O)N[C@H]3CCCNC3)S2)NC(=O)N)F
Isomeric SMILES C1C[C@@H](CNC1)NC(=O)C2=C(C=C(S2)C#CC3=CC(=CC=C3)F)NC(=O)N
InChI InChI=1S/C19H19FN4O2S/c20-13-4-1-3-12(9-13)6-7-15-10-16(24-19(21)26)17(27-15)18(25)23-14-5-2-8-22-11-14/h1,3-4,9-10,14,22H,2,5,8,11H2,(H,23,25)(H3,21,24,26)/t14-/m0/s1
InChI Key ULVAGWVTXBTFRN-AWEZNQCLSA-N

Generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/)
Bioactivity Comments
PHI-101 has demonstrated potent inhibitory action against FLT3 resistance mutations (ITD/D835V, gatekeeper ITD/F691L) and FLT3 activating mutations (ITD, D835V, D835H, and D835Y) [1]. Orally administered PHI-101 induced tumor regression in xenograft mouse tumours expressing FLT3ITD, FLT3TKD or FLT3ITD/TKD mutants. We await formal publication of quantitative data to support inhibitory activity at PHI-101's proposed molecular targets.