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