a pyrimidine ribonucleoside + H2O => a pyrimidine nucleobase + D-ribose
a pyrimidine ribonucleoside + h2o => a pyrimidine nucleobase + d-ribose
a pyrimidine ribonucleoside + H2O => a pyrimidine nucleobase + D-ribose
a pyrimidine ribonucleoside + h2o => a pyrimidine nucleobase + d-ribose