preferred_name: nicotinate(out) + Na(+)(out) => nicotinate(in) + Na(+)(in)
preferred_name_lc: nicotinate(out) + na(+)(out) => nicotinate(in) + na(+)(in)
label: nicotinate(out) + Na(+)(out) => nicotinate(in) + Na(+)(in)
label_lc: nicotinate(out) + na(+)(out) => nicotinate(in) + na(+)(in)