preferred_name: a menaquinone + nitrite + H2O => a menaquinol + nitrate
preferred_name_lc: a menaquinone + nitrite + h2o => a menaquinol + nitrate
label: a menaquinone + nitrite + H2O => a menaquinol + nitrate
label_lc: a menaquinone + nitrite + h2o => a menaquinol + nitrate