preferred_name: Fe(II)-heme i + A + H2O <=> Fe(II)-hydroxyheme i + AH2
preferred_name_lc: fe(ii)-heme i + a + h2o <=> fe(ii)-hydroxyheme i + ah2
label: Fe(II)-heme i + A + H2O <=> Fe(II)-hydroxyheme i + AH2
label_lc: fe(ii)-heme i + a + h2o <=> fe(ii)-hydroxyheme i + ah2