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