preferred_name: a nucleoside 5'-phosphate + H2O <=> a nucleoside + phosphate
preferred_name_lc: a nucleoside 5'-phosphate + h2o <=> a nucleoside + phosphate
label: a nucleoside 5'-phosphate + H2O <=> a nucleoside + phosphate
label_lc: a nucleoside 5'-phosphate + h2o <=> a nucleoside + phosphate