TP-13 is an anxiolytic drug with a novel chemical structure, which is used in scientific research. It has similar effects to benzodiazepine drugs, but is structurally distinct and so is classed as a nonbenzodiazepine anxiolytic. It is a subtype-selective partial agonist at GABA<sub>A</sub> receptors, binding selectively to GABA<sub>A</sub> receptor complexes bearing ñ2 and ñ3 subunits. It has modest anticonvulsant activity although less than that of diazepam, and its main effect is likely to be selective anxiolytic action, as seen with other related ñ2/3-preferring agonists such as L-838,417.