## Endpoint to Predict
- Endpoint scope: assay
- Measurement type: IC50
- Label type: continuous
- Binary semantics: pchembl
- Assay description: Inhibition Kinases In Vitro Assay: The compounds were dissolved in 100% DMSO, and obtained solutions were serially diluted in reaction buffer (50 mM Tris pH 7.5, 10 mM MgCl2, 0.25 mM EGTA, 0.1 mM Na3VO4, 0.01% Triton X-100, 2.5 mM DTT). Recombinant FGFR1, FGFR2, FGFR3 or KDR kinase (Carna Biosciences) was diluted to final concentration of 0.1 ng/μL in the dilution buffer (50 mM Tris-HCl pH 7.5, 150 mM NaCl, 10% glycerol, 0.05% Triton X-100, 1 mM DTT). 5 μL of prepared solutions of the compounds along with 5 μL of selected kinase solution were added to each well of a 96-well plate. The plate was incubated for 10 minutes at 25° C. in plate shaker thermostat with orbital shaking at 400 rpm. To negative control wells all reagents were added except compounds and kinase, while to positive control wells all reagents except tested compounds. The reaction was initiated by adding 15 μL of solution consisting of 5× concentrated reaction buffer (50 mM Tris pH 7.5, 10 mM MgCl2, 0.25 mM EGTA, 0.1 mM Na3VO4, 0.01% Triton X-100, 2.5 mM DTT), water, 50 μM ATP, 16.67 μM IGF-1Rtide peptide (Milipore). Than the plate was incubated for 1 hour at 25° C. in plate shaker thermostat with orbital shaking at 400 rpm. Detection of ADP obtained in enzymatic reaction was performed with ADP-Glo Kinase Assay (Promega). 25 μL of ADP-Glo Reagent was added to each well of 96-well plate and the plate was incubated for 40 minutes at 25° C. in plate shaker thermostat with orbital shaking at 400 rpm. Then 50 μL of Kinase Detection Reagent was added to each well of 96-well plate and the plate was incubated for 30 minutes at 25° C. in plate shaker thermostat with orbital shaking at 400 rpm. Finally, the intensity of luminescence was measured using Victor Light luminometer (Perkin Elmer, Inc.).
- Assay organism: Homo sapiens
- Target name: Fibroblast growth factor receptor 3
- Target type: SINGLE PROTEIN
- Target organism: Homo sapiens

## Reference Molecule A
- Canonical SMILES: COc1cc(CCc2cc(-c3nc4ccc(-c5ccn(CCN6CCOCC6)n5)cc4[nH]3)n[nH]2)cc(OC)c1
- Properties:
- ChEMBL ID: CHEMBL5866093
- Molecular weight: 527.63
- Heavy atoms: 39
- Hydrogen bond donors: 2
- Hydrogen bond acceptors: 7
- TPSA: 106.11
- LogP: 3.95
- Rotatable bonds: 10
- Ring count: 6
- Aromatic rings: 5
- Formal charge: 0
- Fraction Csp3: 0.34
- QED: 0.28

## Known Reference Result on This Endpoint
- Molecule A clean result: median pChEMBL = 7.75
- This result is provided as context for predicting Molecule B on the same endpoint.

## Reference Molecule A Other ChEMBL Evidence
- type IC50; relation =; value 17.8; units nM; pChEMBL 7.75; comment 677279

## Query Molecule B
- Canonical SMILES: COc1cc(CCc2cc(-c3nc4ccc(C(=O)N5CCOCC5)cc4[nH]3)n[nH]2)cc(OC)c1
- Properties:
- ChEMBL ID: CHEMBL5183691
- Molecular weight: 461.52
- Heavy atoms: 34
- Hydrogen bond donors: 2
- Hydrogen bond acceptors: 6
- TPSA: 105.36
- LogP: 3.23
- Rotatable bonds: 7
- Ring count: 5
- Aromatic rings: 4
- Formal charge: 0
- Fraction Csp3: 0.32
- QED: 0.44

## Molecule Similarity
- Weighted Tanimoto: 0.61

Answer: 7.6