CHEMBL3708014

Inhibition Assay: MAO-A and MAO-B activity was measured using radioactive substrates. The substrate for MAO-A was 5 HT and for MAO-B was PEA. When measuring the activity of MAO-A, the MAO-B activity was inhibited with deprenyl and when measuring the activity of MAO-B the activity of MAO-A was inhibited with clorgylin. Blank samples were produced using TCP to inhibit both of the enzymes. The metabolites were extracted to toluene and read in a β -counter. The results are expressed in relative activity and normalized to the amount of protein in the tissue. Figs. 1 and 2 show MAO-A/MAO-B activity of compounds 3, 4 and of 0-Methyl-M3O at various concentrations (10 -"5 -10 -"8 ). As presented in Figs. 1 and 2, it can be seen that compounds 3, 4 and 0-Methyl-M3O were all potent inhibitors of MAO-A and MAO-B extracted from rat brain, compound 3 clearly the most potent inhibitor of the three compounds.