preferred_name: nicotinate(in) + a carboxylate(out) <=> nicotinate(out) + a carboxylate(in)
preferred_name_lc: nicotinate(in) + a carboxylate(out) <=> nicotinate(out) + a carboxylate(in)
label: nicotinate(in) + a carboxylate(out) <=> nicotinate(out) + a carboxylate(in)
label_lc: nicotinate(in) + a carboxylate(out) <=> nicotinate(out) + a carboxylate(in)