preferred_name: formate(out) + chloride(in) => formate(in) + chloride(out)
preferred_name_lc: formate(out) + chloride(in) => formate(in) + chloride(out)
label: formate(out) + chloride(in) => formate(in) + chloride(out)
label_lc: formate(out) + chloride(in) => formate(in) + chloride(out)