preferred_name: a thiol + a carboxylate + H(+) => a thioester + H2O
preferred_name_lc: a thiol + a carboxylate + h(+) => a thioester + h2o
label: a thiol + a carboxylate + H(+) => a thioester + H2O
label_lc: a thiol + a carboxylate + h(+) => a thioester + h2o