Using CC(=O)Oc1ccc2c(Br)c([C@@H](COC(=O)C(C)(C)C)OC(C)(C)C)c(C)cc2n1 to produce Cc1cc2[nH]c(=O)ccc2c(Br)c1[C@@H](COC(=O)C(C)(C)C)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.