hMAO-B-IN-9 (Compound 25c) acts as a non-competitive inhibitor of monoamine oxidase B (MAO-B), with an IC50 value of 1.58 µM (hMAO-B). Additionally, it functions as a chelator, forming complexes with iron ions which suppress ferroptosis induced by erastin. This compound exhibits antioxidant activity through the downregulation of reactive oxygen species (ROS) levels. It has also been shown to improve cognitive functions in mice without significant toxicity at a dose of 30 mg/kg. Computer predictions suggest that hMAO-B-IN-9 is permeable to the blood-brain barrier.
