preferred_name: morphine + formaldehyde + succinate + CO2 => codeine + 2-oxoglutarate + O2
preferred_name_lc: morphine + formaldehyde + succinate + co2 => codeine + 2-oxoglutarate + o2
label: morphine + formaldehyde + succinate + CO2 => codeine + 2-oxoglutarate + O2
label_lc: morphine + formaldehyde + succinate + co2 => codeine + 2-oxoglutarate + o2