preferred_name: estrone 3-sulfate + H2O <=> estrone + sulfate + H(+)
preferred_name_lc: estrone 3-sulfate + h2o <=> estrone + sulfate + h(+)
label: estrone 3-sulfate + H2O <=> estrone + sulfate + H(+)
label_lc: estrone 3-sulfate + h2o <=> estrone + sulfate + h(+)