Using CC1(C)OB(c2ccc3c(c2)COC3=O)OC1(C)C, CCOc1ccc(Br)c(OCOC)c1OC to produce CCOc1ccc(-c2ccc3c(c2)COC3=O)c(OCOC)c1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.