old_contents: # Data sources for kinetics
  database(
      thermoLibraries = ['primaryThermoLibrary'],
      reactionLibraries = [],  
      seedMechanisms = [],
      kineticsDepositories = 'default', 
      #this section lists possible reaction families to find reactioons with
      kineticsFamilies = ['!Intra_Disproportionation','!Substitution_O'],
      kineticsEstimator = 'rate rules',
  )
  
  # List all species you want reactions between
  species(
      label='ethane',
      reactive=True,
      structure=SMILES("CC"),
  )
  
  species(
      label='H',
      reactive=True,
      structure=SMILES("[H]"),
  )
  
  species(
      label='butane',
      reactive=True,
      structure=SMILES("CCCC"),
  )
  
  
  # you must list reactor conditions (though this may not effect the output)
  simpleReactor(
      temperature=(650,'K'),
      pressure=(10.0,'bar'),
      initialMoleFractions={
          "ethane": 1,
      },
      terminationConversion={
          'butane': .99,
      },
      terminationTime=(40,'s'),
  )
new_contents: # Data sources for kinetics
  database(
      thermoLibraries = ['primaryThermoLibrary'],
      reactionLibraries = [],  
      seedMechanisms = [],
      kineticsDepositories = 'default', 
      #this section lists possible reaction families to find reactioons with
      kineticsFamilies = ['R_Recombination'],
      kineticsEstimator = 'rate rules',
  )
  
  # List all species you want reactions between
  species(
      label='Propyl',
      reactive=True,
      structure=SMILES("CC[CH3]"),
  )
  
  species(
      label='H',
      reactive=True,
      structure=SMILES("[H]"),
  )
  
  
  # you must list reactor conditions (though this may not effect the output)
  simpleReactor(
      temperature=(650,'K'),
      pressure=(10.0,'bar'),
      initialMoleFractions={
          "Propyl": 1,
      },
      terminationConversion={
          'Propyl': .99,
      },
      terminationTime=(40,'s'),
  )
  
subject: Cut down on the loading of families in the normal GenerateReactionsTest