TCS-1205TCS 1205 is a GABAA receptor positive allosteric modulator of the tryptamine family. It is a benzodiazepine site agonist selective for certain subunits.PharmacologyTCS 1205 acts at the benzodiazepine binding site, it is selective for the α1 and α2 subunits of the GABAA receptor. In vivo, it has anxiolytic effects but no sedative effects.ChemistryDespite acting at the benzodiazepine receptor, it does not contain the benzodiazepine structure, it could therefore be classed as a nonbenzodiazepine. The drug is a substituted tryptamine derivative.