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 parp inhibitor.
user
O=C1Nc2ccccc2-n2c(-c3ccccn3)nc3cccc1c32
assistant