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NUCLEIC ACIDS AND RELATED COMPOUNDS 



TABLE 1. SOME NATURALLY OCCURRING PURINES 



hypoxanthine (Lupiniis Inteiis) 



CH3 



theobromine (Theobronia cacao) 



xanthine (Coffea spp. ) 



caffeine {Coffea spp. ) 



heteroxanthin (Beta vulgaris) 



uric acid (Melilotus officinalis) 



theophylline (Camellia sinensis) 



