preferred_name: N-hydroxyguanidine + L-homoserine => L-canavanine + H2O
preferred_name_lc: n-hydroxyguanidine + l-homoserine => l-canavanine + h2o
label: N-hydroxyguanidine + L-homoserine => L-canavanine + H2O
label_lc: n-hydroxyguanidine + l-homoserine => l-canavanine + h2o