label: 4-methylsulfanyl-2-oxobutanoate + L-kynurenine = 4-(2-aminophenyl)-2,4-dioxobutanoate + L-methionine
label_lc: 4-methylsulfanyl-2-oxobutanoate + l-kynurenine = 4-(2-aminophenyl)-2,4-dioxobutanoate + l-methionine