The molecule is an L-tyrosine derivative that is L-DOPA in which the hydrogen at position 2 on the phenyl ring is replaced by a cysteinyl group. Found in the urine of patients with melanoma. It has a role as a human urinary metabolite. It is a member of catechols, a S-organyl-L-cysteine, a L-tyrosine derivative, an aryl sulfide, an amino dicarboxylic acid, a diamine and a S-conjugate. It derives from a L-dopa.
(2S)-2-amino-3-[2-[(2R)-2-amino-2-carboxyethyl]sulfanyl-3,4-dihydroxyphenyl]propanoic acid