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