Using CC(=O)OCCBr, COCN(c1[nH]nc(OC)c1-c1ccc2c(c1)OCO2)S(=O)(=O)CCc1ccccc1 to produce COCN(c1nn(CCOC(C)=O)c(OC)c1-c1ccc2c(c1)OCO2)S(=O)(=O)CCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.