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