You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Suppose there is a molecule that meets the following description: When heated to decomposition material emits toxic fumes of nitrogen oxides. Please write the SMILES representation of it.
user
CC(=O)OCC(CCn1cnc2cnc(N)nc21)COC(C)=O
assistant