preferred_name: a pyrimidine ribonucleoside + H2O <=> a pyrimidine nucleobase + D-ribose
preferred_name_lc: a pyrimidine ribonucleoside + h2o <=> a pyrimidine nucleobase + d-ribose
label: a pyrimidine ribonucleoside + H2O <=> a pyrimidine nucleobase + D-ribose
label_lc: a pyrimidine ribonucleoside + h2o <=> a pyrimidine nucleobase + d-ribose