preferred_name: protoporphyrin IX + 3 menaquinol-8 => protoporphyrinogen IX + 3 menaquinone-8
preferred_name_lc: protoporphyrin ix + 3 menaquinol-8 => protoporphyrinogen ix + 3 menaquinone-8
label: protoporphyrin IX + 3 menaquinol-8 => protoporphyrinogen IX + 3 menaquinone-8
label_lc: protoporphyrin ix + 3 menaquinol-8 => protoporphyrinogen ix + 3 menaquinone-8