You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I need a molecule that meets the following conditions: When heated to decomposition material emits toxic fumes of nitrogen oxides. famciclovir/ Please represent the molecule in SMILES.
user
Nc1nc2c(ncn2CCC(CO)CO)c(=O)[nH]1
assistant