Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         "crystal-kingdom"
           chemical substances
             chemical compounds
               Class stibines [R3Sb]
                 1 "stibine"ᵀ [SbH3]
                 2 Class primary stibines [RSbH2 (R≠H)]
                 3 Class secondary stibines [R2SbH (R≠H)]
                 4 Class tertiary stibines [R3Sb (R≠H)]