( - ) -baclofen depressed the amplitude of the extracellular excitatory postsynaptic potential with an ic50 of 3.7 microm and was 180 times more potent than ( + ) -baclofen . gamma-aminobutyric acid , 3-aminopropanesulfonic acid and imidazole-4-acetic acid also inhibited transmission at this site .
C0004609
baclofen
C0016904
gamma-aminobutyric acid