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: It belongs to both the anti viral agent and anti viral classes of molecules.
user
Nc1nc2c(ncn2COC(COC(=O)CO)COC(=O)CO)c(=O)[nH]1
assistant