4-Chloro-L-phenylalanine

2-amino-3-(4-chlorophenyl)propanoic acid is a phenylalanine derivative. A selective and irreversible inhibitor of tryptophan hydroxylase, a rate-limiting enzyme in the biosynthesis of serotonin (5-HYDROXYTRYPTAMINE). Fenclonine acts pharmacologically to deplete endogenous levels of serotonin.

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