
Keywords: AMP; (+)-amphetamine; Cys; L-cysteine; FI; fixed-interval schedule of behavioral reinforcement; FR; fixed-ratio schedule of behavioral reinforcement; [3H]-METH; (+)-[2â²,6â²-3H(n)]-methamphetamine; HSMO9; the METH-like hapten (S)-N-(2-(mercaptoethyl)-6-