(-)-.alpha.-Amino-p-hydroxyhydrocinnamic acid .alpha.-Amino-.beta.-(4-hydroxyphenyl)propionic acid 60-18-4 Benzenepropanoic acid, .alpha.-amino-4-hydroxy-, (S)- L-2-Amino-3-p-hydroxyphenylpropanoic acid L-Phenylalanine, 4-hydroxy- L-Tryosine L-Tyrosine L-p-Tyrosine NSC9973 Propanoic acid, 2-amino-3-(4-hydroxyphenyl)-, (S)- TYROSINE, (L) Tyrosine Tyrosine, L- p-Tyrosine