SEARCH Articles Figures Tables 3- Methyl-4-hydroxyphenylpyruvic acid 4- Hydroxyphenylpyruvic acid 4- Hydroxyphenylpyruvic acid 4-Hydroxyphenylpyruvic Hydroxyphenylpyruvate P-Hydroxyphenylpyruvic acid Tyrosinosis and Other Cases of p Hydroxyphenylpyruvic Acid Excretion Urine 4-hydroxyphenylpyruvic acid