User: I need a molecule that is not flammable gas.
Assistant: Here is a molecule that is not flammable gas: Nc1cc([N+](=O)[O-])ccc1O.
User: I need a molecule that is {H221#not &NULL}{H221__names__adjective}.
Assistant: Here is a molecule that is {H221#not &NULL}{H221__names__adjective}: {SMILES#}.