preferred_name: siroheme + 2 H(+) => 12,18-didecarboxysiroheme + 2 CO2
preferred_name_lc: siroheme + 2 h(+) => 12,18-didecarboxysiroheme + 2 co2
label: siroheme + 2 H(+) => 12,18-didecarboxysiroheme + 2 CO2
label_lc: siroheme + 2 h(+) => 12,18-didecarboxysiroheme + 2 co2