was determined using the MAO–Glo kit (Promega, Madison, WI,
USA). All the experimental conditions and procedures used for this
chemiluminescent assay were similar to those reported in our previous
paper.67 (link) The kinetic mechanism of enzyme
inhibition was identified via Lineweaver–Burk and Dixon plots.68 (link),69 (link) Different concentrations of MAO substrates were used in the presence
or absence of the test compounds, and the procedure was similar to
the enzyme inhibition assay.