Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         "crystal-kingdom"
           chemical substances
             chemical compounds
               Class phenols [ArOH]
                 Class flavanols
                   Class catechins
                     Stereoisomer (+)-gallocatechin
                     Stereoisomer (-)-epicatechin gallate
                     Stereoisomer (-)-epigallocatechin
                     catechin
                     epigallocatechin gallate