Esuprone is an

experimental drug An experimental drug is a medicinal product (a drug or vaccine) that has not yet received approval from governmental regulatory authorities for routine use in human or veterinary medicine. A medicinal product may be approved for use in one diseas ...

candidate being investigated as an antidepressant. It acts as a

monoamine oxidase A Monoamine oxidase A, also known as MAO-A, is an enzyme that in humans is encoded by the ''MAOA'' gene. This gene is one of two neighboring gene family members that encode mitochondrial enzymes which catalyze the oxidative deamination of amines, ...

(MAO-A) inhibitor.

References

{{Monoamine metabolism modulators Antidepressants Phenyl sulfonate ethers Coumarins