preferred_name: carboxynorspermidine + H(+) <=> norspermidine + CO2
preferred_name_lc: carboxynorspermidine + h(+) <=> norspermidine + co2
label: carboxynorspermidine + H(+) <=> norspermidine + CO2
label_lc: carboxynorspermidine + h(+) <=> norspermidine + co2