preferred_name: ethanol + octadecanoate + H(+) => ethyl octadecanoate + H2O
preferred_name_lc: ethanol + octadecanoate + h(+) => ethyl octadecanoate + h2o
label: ethanol + octadecanoate + H(+) => ethyl octadecanoate + H2O
label_lc: ethanol + octadecanoate + h(+) => ethyl octadecanoate + h2o