4-(2-amino-3-hydroxyphenyl)-2,4-dioxobutanoate => xanthurenate + H2O
4-(2-amino-3-hydroxyphenyl)-2,4-dioxobutanoate => xanthurenate + h2o
4-(2-amino-3-hydroxyphenyl)-2,4-dioxobutanoate => xanthurenate + H2O
4-(2-amino-3-hydroxyphenyl)-2,4-dioxobutanoate => xanthurenate + h2o