preferred_name: urate(out) + succinate(in) = urate(in) + succinate(out)
preferred_name_lc: urate(out) + succinate(in) = urate(in) + succinate(out)
label: urate(out) + succinate(in) = urate(in) + succinate(out)
label_lc: urate(out) + succinate(in) = urate(in) + succinate(out)