preferred_name: 2 chloride(in) + H(+)(out) = 2 chloride(out) + H(+)(in)
preferred_name_lc: 2 chloride(in) + h(+)(out) = 2 chloride(out) + h(+)(in)
label: 2 chloride(in) + H(+)(out) = 2 chloride(out) + H(+)(in)
label_lc: 2 chloride(in) + h(+)(out) = 2 chloride(out) + h(+)(in)