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