in this study anesthetized dogs were injected with either of the serotonin precursors l-tryptophan or 5-hydroxy-l-tryptophan in conjunction with the monoamine oxidase inhibitor pheneizine and the selective peripheral l-amino acid decarboxylase inhibitor carbidopa .
C0041249
tryptophan
C0000578
5-hydroxy-l-tryptophan