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 hepatitis b treatment class of molecules.
user
O=c1c2ccc(N3CCNC3)cc2oc2c(F)cccc12
assistant