## Endpoint to Predict
- Endpoint scope: assay
- Measurement type: IC50
- Label type: continuous
- Binary semantics: pchembl
- Assay description: Kinase Inhibition Assays: The aim of this experiment is to detect the inhibitory activity of the compounds of the present invention against in vitro protein kinases using isotope labeling (labeled gamma phosphate groups on ATP). Kinase inhibition profiles were determined using KinaseProfiler services provided by Euro fins, and ATP concentrations used are the Km of corresponding kinases. In this study, we examined Abl (T315I) (h), ALK (h), ARK5 (h), Axl (h), Blk (h), Bmx (h), BTK (h), B-Raf (H), ckit (h), cSRC (h), CDK7, CHK1 (h), c-RAF (h), DDR2 (h), EGFR (h), EphA1 (h), EphA2 (h), EphA8 (h (H), FGF (h), Ft (h), Ft (h), F (h), F (h), Ft (h), Hb (h), ErbB2 (h), FAK (h) (H), JK3 (h), IKKalpha (h), IKKbeta (h), Itk (h), JAK3 (h), JNK11 (h), KDR (h), Lyn (h), MAPK1 (h), MEK1 (h (H), PKA (h), PKB [alpha](h), PKB [beta] (h), PKC [alpha] (h), Ret (H), RIPK2 (h), Src (1-530) (h), TAK1 (h), TBK1 (h), Tec (h) activated, Tie2 (h), TrkA (h), ULK3 (h) Yes (h), PI3 Kinase a (h) and other kinase in vitro inhibitory activity. The kinase inhibitory activity of the test compound is expressed as IC50 (half inhibitory concentration) or the inhibitory rate of the test compound at a concentration of 10 ??M for kinase activity. IC50 values can be obtained by calculating the inhibition rate of the kinase activity by the test compound at a series of different concentrations. The assay was as follows: In a reaction tube, the buffer (8 mM MOPS, pH 7, 0.2 mM EDTA, 10 mM MnCl2), the kinase to be tested (5-10 mU), the substrate to be tested kinase, 10 mM acetic acid Magnesium and gamma 33P-ATP solutions, as well as different concentrations of the test compound. MgATP was then added to the reaction to initiate the enzymatic reaction and incubated at room temperature for 40 minutes. The reaction was finally quenched with 5 ul of 3% phosphate buffer and 10 uL of the reaction solution was titrated onto a filtermat A membrane, washed three times with 75 mM phosphate solution for 5 minutes each, and washed again with methanol. Finally, the filtermat A film is dried and scintigraphized, and the size of the scintillation count reflects the degree to which the substrate is phosphorylated, thereby demonstrating that the kinase activity is inhibited. Among them, the percentage of the remaining active protein=the active protein of the experimental group the active protein of the control group 100%.
- Assay organism: Homo sapiens
- Target name: Platelet-derived growth factor receptor alpha
- Target type: SINGLE PROTEIN
- Target organism: Homo sapiens

## Reference Molecule A
- Canonical SMILES: CCn1nc(C#Cc2cc(C(=O)Nc3ccc(CN4CCN(C)CC4)c(C(F)(F)F)c3)ccc2C)c2c(N)ncnc21
- Properties:
- ChEMBL ID: CHEMBL3426225
- Molecule type: Small molecule
- Molecular weight: 576.63
- Heavy atoms: 42
- Hydrogen bond donors: 2
- Hydrogen bond acceptors: 7
- TPSA: 105.2
- LogP: 4.16
- Rotatable bonds: 5
- Ring count: 5
- Aromatic rings: 4
- Formal charge: 0
- Fraction Csp3: 0.33
- QED: 0.34

## Known Reference Result on This Endpoint
- Molecule A clean result: median pChEMBL = 6.05
- This result is provided as context for predicting Molecule B on the same endpoint.

## Reference Molecule A Other ChEMBL Evidence
- type IC50; relation =; value 890; units nM; pChEMBL 6.05; comment 756988

## Query Molecule B
- Canonical SMILES: Cc1ccc(NC(=O)c2cccc(C(F)(F)F)c2)cc1C#Cc1nn(C2CCN(C)CC2)c2ncnc(N)c12
- Properties:
- ChEMBL ID: CHEMBL4787515
- Molecule type: Unknown
- Molecular weight: 533.56
- Heavy atoms: 39
- Hydrogen bond donors: 2
- Hydrogen bond acceptors: 6
- TPSA: 101.96
- LogP: 4.65
- Rotatable bonds: 3
- Ring count: 5
- Aromatic rings: 4
- Formal charge: 0
- Fraction Csp3: 0.29
- QED: 0.37

## Molecule Similarity
- Weighted Tanimoto: 0.6

Answer: 6.4