Natura - nature
Status: extant
   actualia - actual entities
  Status: extant
     Mundus Plinius - physical world
    Status: extant
       naturalia - natural bodies
      Status: extant
         "crystal-kingdom"
        Status: extant
           chemical substances
          Status: extant
             chemical compounds
            Status: extant
               Class amides [RkE(=O)l(OH)m (l≠0; ≥1 (OH):=(NR2))]
              Status: extant
                 Class peptides [H2NCH(R)C(=O)[NHCH(R)C(=O)]nOH]
                Status: extant
                   Class polypeptides
                  Status: extant
                     Class proteins
                    Status: extant
                       botulinum toxin (BTX)
                      Status: extant