Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         "crystal-kingdom"
           chemical substances
             chemical compounds
               Class carbohydrates [Cn(H2O)n, etc.]
                 Class saccharides
                   Class monosaccharides - sugars
                     Class aldoses [H[CH(OH)]nC(=O)H (n>=2), etc.]
                       1 glyceraldehyde [C3H6O3; CH(=O)CH(OH)CH2OH]
                       2.1 erythrose [C4H8O4; CH(=O)[CHOH]2CH2OH]
                       2.2 threose [C4H8O4; CH(=O)[CHOH]2CH2OH]
                       3.1.1 ribose [C5H10O5; CH(=O)[CHOH]3CH2OH]
                       3.1.2 arabinose [C5H10O5; CH(=O)[CHOH]3CH2OH]
                       3.2.1 xylose [C5H10O5; CH(=O)[CHOH]3CH2OH]
                       3.2.2 lyxose [C5H10O5; CH(=O)[CHOH]3CH2OH]
                       4.1.1.1 allose [C6H12O6; CH(=O)[CHOH]4CH2OH]
                       4.1.1.2 altrose [C6H12O6; CH(=O)[CHOH]4CH2OH]
                       4.1.2.1 glucose [C6H12O6; CH(=O)[CHOH]4CH2OH]
                       4.1.2.2 mannose [C6H12O6; CH(=O)[CHOH]4CH2OH]
                       4.2.1.1 gulose [C6H12O6; CH(=O)[CHOH]4CH2OH]
                       4.2.1.2 idose [C6H12O6; CH(=O)[CHOH]4CH2OH]
                       4.2.2.1 galactose [C6H12O6; CH(=O)[CHOH]4CH2OH]
                       4.2.2.2 talose [C6H12O6; CH(=O)[CHOH]4CH2OH]