You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
The molecule is a hepatitis b treatment and belongs to the anti viral class of molecules, with the characteristic of being anti viral agent. Use the above information to create a molecule.
user
CCOC(=O)C1=C(CN2CCOCC2COC=O)NC(c2nccs2)=NC1c1ccc(F)cc1Cl
assistant