Using COc1nc(C(=O)OC(C)(C)C)c(OCc2ccccc2)c(=O)[nH]1, COC(=O)CBr to produce COC(=O)COc1nc(OC)nc(C(=O)OC(C)(C)C)c1OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.