preferred_name: 4-methylsulfanyl-2-oxobutanoate + L-kynurenine => 4-(2-aminophenyl)-2,4-dioxobutanoate + L-methionine
preferred_name_lc: 4-methylsulfanyl-2-oxobutanoate + l-kynurenine => 4-(2-aminophenyl)-2,4-dioxobutanoate + l-methionine
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