Using CC(C)(C)O, O=C(O)CCCCc1cc2cc(Br)ccc2nc1-c1ccccc1 to produce CC(C)(C)OC(=O)CCCCc1cc2cc(Br)ccc2nc1-c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.