code: def rdkitmol(self):
          r'''RDKit object of the chemical, without hydrogen. If RDKit is not
          available, holds None.
  
          For examples of what can be done with RDKit, see
          `their website <http://www.rdkit.org/docs/GettingStartedInPython.html>`_.
          '''
          if self.__rdkitmol:
              return self.__rdkitmol
          else:
              try:
                  self.__rdkitmol = Chem.MolFromSmiles(self.smiles)
                  return self.__rdkitmol
              except:
                  return Nonf rdkitmol(self):
          r'''RDKit object of the chemical, without hydrogen. If RDKit is not
          available, holds None.
  
          For examples of what can be done with RDKit, see
          `their website <http://www.rdkit.org/docs/GettingStartedInPython.html>`_.
          '''
          if self.__rdkitmol:
              return self.__rdkitmol
          else:
              try:
                  self.__rdkitmol = Chem.MolFromSmiles(self.smiles)
                  return self.__rdkitmol
              except:
                  return None
docs: r'''RDKit object of the chemical, without hydrogen. If RDKit is not
          available, holds None.
  
          For examples of what can be done with RDKit, see
          `their website <http://www.rdkit.org/docs/GettingStartedInPython.html>`_.