Using COCCOCCBr, O=C1c2ccc(O)cc2S(=O)(=O)N1Cc1ccccc1 to produce COCCOCCOc1ccc2c(c1)S(=O)(=O)N(Cc1ccccc1)C2=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.