Using COc1ccc(-c2cccc3nc(Nc4ccc(OCCCN5C(=O)c6ccccc6C5=O)cc4)nn23)cc1 to produce COc1ccc(-c2cccc3nc(Nc4ccc(OCCCN)cc4)nn23)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.