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: The molecule is a rsv inhibitor and is anti viral. Please represent the molecule in SMILES.
user
CC1c2ccccc2CCN1C(=O)c1cc(C2CC2)c2nc(-c3ccc(NC(=O)N4CCCC4)cc3F)cn2c1
assistant