Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         "crystal-kingdom"
           chemical substances
             chemical compounds
               Class "lipids"
                 Class glycolipids
                   Class glycosphingolipids
                     1 Class cerebrosides [H3C(CH2)12CH=CHCH(OH)CH(NHC(=O)R)CH2O[glucose or galactose]]
                     1 neutral glycosphingolipids
                     2 acidic glycosphingolipids
                     3 Class globosides