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