preferred_name: Guanine + H2O => Xanthine + NH4+ (Saccharomyces cerevisiae)
preferred_name_lc: guanine + h2o => xanthine + nh4+ (saccharomyces cerevisiae)
label: Guanine + H2O => Xanthine + NH4+ (Saccharomyces cerevisiae)
label_lc: guanine + h2o => xanthine + nh4+ (saccharomyces cerevisiae)