You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I give you a description of a molecule, and you need to return one molecule in SMILES that meets the description. The description: When heated to decomposition it emits toxic vapors of nitrogen oxides.
user
COC=C(C(=O)OC)c1ccccc1Oc1cc(Oc2ccccc2C#N)ncn1
assistant