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