preferred_name: Guanine + H2O => Xanthine + NH4+ (Xenopus tropicalis)
preferred_name_lc: guanine + h2o => xanthine + nh4+ (xenopus tropicalis)
label: Guanine + H2O => Xanthine + NH4+ (Xenopus tropicalis)
label_lc: guanine + h2o => xanthine + nh4+ (xenopus tropicalis)