preferred_name: protoporphyrin IX + 3 a quinol => protoporphyrinogen IX + 3 a quinone
preferred_name_lc: protoporphyrin ix + 3 a quinol => protoporphyrinogen ix + 3 a quinone
label: protoporphyrin IX + 3 a quinol => protoporphyrinogen IX + 3 a quinone
label_lc: protoporphyrin ix + 3 a quinol => protoporphyrinogen ix + 3 a quinone