Using O=C(Cn1cccc(OCc2ccccc2)c1=O)N(Cc1ccccc1)c1ccccc1 to produce O=C(Cn1cccc(O)c1=O)N(Cc1ccccc1)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.