Xanthurenic acid, a molecule arising from tryptophan metabolism by transamination of 3-hydroxykynurenine, activates mGlu2/3 Metabotropic glutamate receptors (mGlu2 and mGlu3).

Mosapride is a gastroprokinetic agent that acts as a selective 5HT4 agonist.

Levocetirizine is the active R-enantiomer of cetirizine and represents a new second-generation histamine H1 antagonist.

Perospirone is an atypical or second-generation antipsychotic of the azapirone family that antagonizes serotonin 5HT2A receptors and dopamine D2 receptors. It also displays affinity towards 5HT1A receptors as a partial agonist.

Phenibut, a GABA analogue, is a central nervous system depressant with anxiolytic and sedative effects.

Mebhydrolin Napadisylate is classified as an antihistamine drug classes used to treat allergies.

Melitracen hydrochloride is a potential dopamine D1/2 receptor antagonist which has antidepressant properties.