tricarboxylic acid L-tyrosine derivative catechols aryl sulfide triamine S-organyl-L-cysteine S-conjugate 2,5-S,S'-dicysteinyldopa 2,5-S,S-Dicysteinyldopa 2,5-S,S-dicysteinyl-3,4-dihydroxyphenylalanine 2,5-bis{[(2R)-2-amino-2-carboxyethyl]sulfanyl}-3-hydroxy-L-tyrosine 3-(2,5-S,S-dicysteinyl-3,4-dihydroxyphenyl)alanine 435.077 435.47300 An L-tyrosine derivative that is L-DOPA in which the hydrogens at positions 2 and 5 on the phenyl ring are replaced by cysteinyl groups. Found in the urine of patients with melanoma. C15H21N3O8S2 CAS:57954-84-4 CHEBI:84298 InChI=1S/C15H21N3O8S2/c16-6(13(21)22)1-5-2-9(27-3-7(17)14(23)24)10(19)11(20)12(5)28-4-8(18)15(25)26/h2,6-8,19-20H,1,3-4,16-18H2,(H,21,22)(H,23,24)(H,25,26)/t6-,7-,8-/m0/s1 N[C@@H](CSc1cc(C[C@H](N)C(O)=O)c(SC[C@H](N)C(O)=O)c(O)c1O)C(O)=O PMID:3104937 PMID:891724 PYGLBYQINHTALU-FXQIFTODSA-N Reaxys:5182705 chebi_ontology