Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         "crystal-kingdom"
           chemical substances
             chemical compounds
               Class nucleotides [HOP(=O)(OH)OCH2CH(O~)CH(OH)CH(Y)CH(base)~ (Y=H or OH)]
                 deoxyadenosine 5'-triphosphate
                 Class deoxyribonucleotides [HOP(=O)(OH)OCH2CH(O~)CH(OH)CH2CH(base)~]
                 4.109 Class ribonucleotides [HOP(=O)(OH)OCH2CH(O~)CH(OH)CH(OH)CH(base)~]
                 4.111 Class oligonucleotides