preferred_name: Guanine + H2O => Xanthine + NH4+ (Schizosaccharomyces pombe)
preferred_name_lc: guanine + h2o => xanthine + nh4+ (schizosaccharomyces pombe)
label: Guanine + H2O => Xanthine + NH4+ (Schizosaccharomyces pombe)
label_lc: guanine + h2o => xanthine + nh4+ (schizosaccharomyces pombe)