preferred_name: a carboxylic ester + H2O => an alcohol + a carboxylate + H(+)
preferred_name_lc: a carboxylic ester + h2o => an alcohol + a carboxylate + h(+)
label: a carboxylic ester + H2O => an alcohol + a carboxylate + H(+)
label_lc: a carboxylic ester + h2o => an alcohol + a carboxylate + h(+)