preferred_name: (R)-lactate(out) + citrate(in) => (R)-lactate(in) + citrate(out)
preferred_name_lc: (r)-lactate(out) + citrate(in) => (r)-lactate(in) + citrate(out)
label: (R)-lactate(out) + citrate(in) => (R)-lactate(in) + citrate(out)
label_lc: (r)-lactate(out) + citrate(in) => (r)-lactate(in) + citrate(out)