User: I need a molecule that is not an oxidizer.
Assistant: Here is a molecule that is not an oxidizer: O=C(O)[C@H](O)c1ccccc1.
User: I need a molecule that is {H270#not &NULL}{H270__names__noun}.
Assistant: Here is a molecule that is {H270#not &NULL}{H270__names__noun}: {SMILES#}.