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