Using [O-][Cl+][O-], Cc1c(C=O)c(=O)n(-c2ccccc2)n1Cc1ccccc1 to produce Cc1c(C(=O)O)c(=O)n(-c2ccccc2)n1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.