Using COC(=O)c1c(CS(=O)(=O)c2ccccc2)ccc(Br)c1OC, C1CCOC1 to produce CCc1ccc(CS(=O)(=O)c2ccccc2)c(C(=O)OC)c1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.