## Endpoint to Predict
- Endpoint scope: assay
- Measurement type: IC50
- Label type: continuous
- Binary semantics: pchembl
- Assay description: Wild Type EGFR and Mutant EGFR Kinase Inhibition Test: The inhibitory effects of compounds to be tested on double mutant EGFR kinase (EGFR T790M/L858R Kinase) (Invitrogen, PV4879) and wild-type EGFR kinase (EGFR WT) (Invitrogen, PV3872) were measured by z-lyte methods.The working concentration of each component in 10 μl T790M/L858R kinase reaction system was: 25 μM ATP, 0.08 (or 0.1) ng/μl EGFR T790M/L858R kinase, 2 μM Tyr04 substrate (Invitrogen, PV3193, similarly hereinafter). After the compounds (i.e., test compounds) prepared by the above-mentioned examples described herein were added, the concentration of DMSO was 2%.The working concentration of each component in 10 μl EGFR WT kinase reaction system was: 10 μM ATP, 0.8 ng/μl EGFR WT kinase, 2 μM Tyr04 substrate. After the test compounds were added, the concentration of DMSO was 2%.Test Methods:10 mM stock solutions of the test compounds dissolved at room temperature were gradiently diluted by 4% DMSO in water to final concentrations of 10-0.01 μM. To each well were added 2.5 μl of solution of the test compounds and 5 μl mixture of the EGFR T790M/L858R kinase (or EGFR WT kinase) and Tyr04 substrate diluted by reaction buffer, and then 2.5 μl of ATP was added to initiate the reaction. Reaction buffer instead of ATP were added to C1 wells, no drugs were added to C2 wells, and the phosphorylated substrates were added to C3 wells according to the instruction.The reaction was performed on a shaking table at room temperature for 60 min. Afterwards, 5 μl of Development Reagent B (Invitrogen) was added, and reacted on a shaking table at room temperature for 60 min. The plates were read in a VictorX5 Microplate Reader (PerkinElmer), for measuring the absorbance at excitation wavelength of 405 nm, and emission wavelength of 450 nm and 520 nm. (For example, C3520nm represents the reading at 520 nm of C3 well).
- Target name: Epidermal growth factor receptor
- Target type: SINGLE PROTEIN
- Target organism: Homo sapiens

## Reference Molecule A
- Canonical SMILES: C=CC(=O)Nc1cc(Nc2ncc(F)c(-c3cnc4c(ccn4C)c3)n2)c(OC)cc1N(C)CCN(C)N
- Properties:
- ChEMBL ID: CHEMBL5925992
- Molecular weight: 519.59
- Heavy atoms: 38
- Hydrogen bond donors: 3
- Hydrogen bond acceptors: 9
- TPSA: 126.46
- LogP: 3.29
- Rotatable bonds: 10
- Ring count: 4
- Aromatic rings: 4
- Formal charge: 0
- Fraction Csp3: 0.23
- QED: 0.16

## Known Reference Result on This Endpoint
- Molecule A clean result: median pChEMBL = 8.7
- This result is provided as context for predicting Molecule B on the same endpoint.

## Reference Molecule A Other ChEMBL Evidence
- type IC50; relation =; value 2; units nM; pChEMBL 8.7; comment 827507

## Query Molecule B
- Canonical SMILES: C=CC(=O)Nc1cc(Nc2ncc(F)c(-c3cnc4c(ccn4C)c3)n2)c(OC)cc1OCCN(C)C
- Properties:
- ChEMBL ID: CHEMBL5771047
- Molecular weight: 505.55
- Heavy atoms: 37
- Hydrogen bond donors: 2
- Hydrogen bond acceptors: 8
- TPSA: 106.43
- LogP: 3.99
- Rotatable bonds: 10
- Ring count: 4
- Aromatic rings: 4
- Formal charge: 0
- Fraction Csp3: 0.23
- QED: 0.31

## Molecule Similarity
- Weighted Tanimoto: 0.77

Answer: 8.7