preferred_name: a chlorophyll + H2O => a chlorophyllide + phytol + H(+)
preferred_name_lc: a chlorophyll + h2o => a chlorophyllide + phytol + h(+)
label: a chlorophyll + H2O => a chlorophyllide + phytol + H(+)
label_lc: a chlorophyll + h2o => a chlorophyllide + phytol + h(+)