preferred_name: ornithine => putrescine + CO2 (Xenopus tropicalis)
preferred_name_lc: ornithine => putrescine + co2 (xenopus tropicalis)
label: ornithine => putrescine + CO2 (Xenopus tropicalis)
label_lc: ornithine => putrescine + co2 (xenopus tropicalis)