Using CCOCCl, N#Cc1c(-c2ccc(Cl)cc2)[nH]c(Sc2ccc(Cl)c(Cl)c2)c1Br to produce CCOCn1c(Sc2ccc(Cl)c(Cl)c2)c(Br)c(C#N)c1-c1ccc(Cl)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.