Keywords: ACPT-I, (1S,3R,4S)-1-Aminocyclopentane-1,3,4-tricarboxylic acid; ADX, addex; AMN082, N,N′-Bis(diphenylmethyl)-1,2-ethanediamine dihydrochloride; L-AP-4, L-(+)-2-Amino-4-phosphonobutyric acid; AMP, amphetamine; APO, apomorphine; BINA, Biphenyl-indanone A;