preferred_name: choline(in) + n Na(+)(in) => choline(out) + n Na(+)(out)
preferred_name_lc: choline(in) + n na(+)(in) => choline(out) + n na(+)(out)
label: choline(in) + n Na(+)(in) => choline(out) + n Na(+)(out)
label_lc: choline(in) + n na(+)(in) => choline(out) + n na(+)(out)