## Endpoint to Predict
- Endpoint scope: assay
- Measurement type: IC50
- Label type: continuous
- Binary semantics: pchembl
- Assay description: Inhibition Activity of the Compound on rhVAP-1 and MAO-A/B: Test substances: the compounds of the present invention shown in Table 1 and prepared according to the methods of the examples 1. Inhibition Activity of the Compounds on the rhVAP-1 Enzyme (1) Instrument, consumable and reagent Multifunctional microplate reader (MD, FlexStation 3), black bottom-impermeable 96-well plate (Corning), rhVAP-1 (PeproTech) (2) Preparation of Compound Concentration Gradient Solutions An appropriate amount of the test compound was dissolved in DMSO to 10 mM and stored. Before the experiment, an appropriate amount of 10 mM test compound mother liquor was diluted to 10 μM solution with DMSO. Then 3-fold gradient dilution with DMSO was performed, and 10 concentration gradients were formed.(3) Preparation of Enzyme Solutions. An appropriate amount of protein diluent was added to the rhVAP-1 powder to obtain 1 mg/mL of the mother liquor for storage. Before the experiment, the dilution with PBS provided a 4×concentration of the enzyme solution.(4) Preparation of 2×Concentration Substrate Mixed Solution An appropriate amount of benzylamine was added to PBS and dissolved to obtain 200 mM of the benzylamine solution. 2 mM Amplex Red mother liquor and 500 U/mL HRP mother liquor were added. The dilution with PBS provided 2×concentration substrate mixed solution.(5) Test Method: First, 10 μL of compound solutions of different concentrations, 25 μL of 4×rhVAP-1 enzyme solution and 15 μL of PBS were added to a 96-well plate, evenly mixed by oscillation, and incubated at 37° C. for 30 minutes. Then 50 μL of 2×substrate mixed solution was added to each well, and immediately the detection was performed with the microplate reader in a condition of an exciting light at 565 nm, an emitting light at 590 nm, the fluorescence intensity for detecting each well of 5 minutes/run, and a total detection time of 25 minutes.
- Target name: Amine oxidase [flavin-containing] A
- Target type: SINGLE PROTEIN
- Target organism: Homo sapiens

## Reference Molecule A
- Canonical SMILES: NC/C(=C/F)COc1ccc2c(c1)CCN(C1CC1)C2=O
- Properties:
- ChEMBL ID: CHEMBL5856095
- Molecular weight: 290.34
- Heavy atoms: 21
- Hydrogen bond donors: 1
- Hydrogen bond acceptors: 3
- TPSA: 55.56
- LogP: 2.04
- Rotatable bonds: 5
- Ring count: 3
- Aromatic rings: 1
- Formal charge: 0
- Fraction Csp3: 0.44
- QED: 0.9

## Known Reference Result on This Endpoint
- Molecule A clean result: median pChEMBL = 5.08
- This result is provided as context for predicting Molecule B on the same endpoint.

## Reference Molecule A Other ChEMBL Evidence
- type IC50; relation =; value 8400; units nM; pChEMBL 5.08; comment 1278514

## Query Molecule B
- Canonical SMILES: NC/C(=C\F)COc1ccc2c(n1)CN(C1CC1)C2=O
- Properties:
- ChEMBL ID: CHEMBL5751464
- Molecular weight: 277.3
- Heavy atoms: 20
- Hydrogen bond donors: 1
- Hydrogen bond acceptors: 4
- TPSA: 68.45
- LogP: 1.39
- Rotatable bonds: 5
- Ring count: 3
- Aromatic rings: 1
- Formal charge: 0
- Fraction Csp3: 0.43
- QED: 0.88

## Molecule Similarity
- Weighted Tanimoto: 0.56

Answer: 4.43