Using COCCOC, O=C(OCc1ccccc1)c1c(NS(=O)(=O)c2ccc(F)cc2)ccc(Br)c1Cl to produce C=Cc1ccc(NS(=O)(=O)c2ccc(F)cc2)c(C(=O)OCc2ccccc2)c1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.