Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         "crystal-kingdom"
           chemical substances
             chemical compounds
               Class alcohols [ROH (R≠H)]
                 Class amino alcohols
                   Class sphingoids
                     14 tetradecasphinganine [14 carbon atoms]
                     18.35 (4E,14E)-sphinga-4,14-dienine [C18H35NO2; HOCH2CH(NH2)CH(OH)CH=CH[CH2]8CH=CH[CH2]2CH3]
                     18.37 "sphingosine" [C18H37NO2; HOCH2CH(NH2)CH(OH)CH=CH[CH2]12CH3]
                     18.39 sphinganine [C18H39NO2; HOCH2CH(NH2)CH(OH)[CH2]14CH3]
                     20 icosasphinganine [20 carbon atoms]