Using CC(C)(C)OC(=O)N[C@]1(C(=O)OC(C)(C)C)[C@@H]2[C@@H](C(=O)OC(C)(C)C)[C@@H]2[C@@H](O)[C@H]1O, Clc1ccc(CBr)cc1Cl to produce CC(C)(C)OC(=O)N[C@]1(C(=O)OC(C)(C)C)[C@@H]2[C@@H](C(=O)OC(C)(C)C)[C@@H]2[C@@H](O)[C@H]1OCc1ccc(Cl)c(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.