Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         "crystal-kingdom"
           chemical substances
             chemical compounds
               Class phenols [ArOH]
                 Class polyphenols
                   Class flavonoids
                   Class isoflavonoids
                   Class neoflavonoids
                   Class stilbenoids
                   Class tannins