2,4,5-Trihydroxyphenyl-D,L-alanine 2,4,5-Trihydroxyphenylalanine 2,5-Dihydroxytyrosine 21373-30-8 3,4,6-Topa 3,4,6-Trihydroxyphenylalanine 6-Hydroxydopa 6-Ohdopa Tyrosine, 2,5-dihydroxy-