preferred_name: K(+)(out) + 2 chloride(out) + Na(+)(out) = K(+)(in) + 2 chloride(in) + Na(+)(in)
preferred_name_lc: k(+)(out) + 2 chloride(out) + na(+)(out) = k(+)(in) + 2 chloride(in) + na(+)(in)
label: K(+)(out) + 2 chloride(out) + Na(+)(out) = K(+)(in) + 2 chloride(in) + Na(+)(in)
label_lc: k(+)(out) + 2 chloride(out) + na(+)(out) = k(+)(in) + 2 chloride(in) + na(+)(in)