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: The molecule is a anti biotic.
user
O=c1c(-c2ccccc2)coc2cc(OCc3ccc([N+](=O)[O-])cc3)ccc12
assistant