Harmine hydrochloride
Harmine, a fluorescent harmala alkaloid belonging to the beta-carboline family of compounds, is a highly cell-permeant and competitive inhibitor of ATP binding to the kinase pocket of DYRK1A, with about 60-fold higher IC50 value for DYRK2. It can also inhibit monoamine oxidases (MAOs) and cdc-like kinases (CLKs).
