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 the anti viral class of molecules.
user
CCC(CNC(C)=O)CC1C(C(=O)OC)CC(C(=O)OC(C)(C)C)N1C(=O)OC(C)(C)C
assistant