preferred_name: hydroxyurea + L-ornithine => N(omega)-hydroxy-L-arginine + H2O
preferred_name_lc: hydroxyurea + l-ornithine => n(omega)-hydroxy-l-arginine + h2o
label: hydroxyurea + L-ornithine => N(omega)-hydroxy-L-arginine + H2O
label_lc: hydroxyurea + l-ornithine => n(omega)-hydroxy-l-arginine + h2o