Using O=C1COCC2(N1)c1cc(O)ccc1Oc1ccc(Br)cc12, CC(C)(C)CI to produce CC(C)(C)COc1ccc2c(c1)[C@]1(COCC(=O)N1)c1cc(Br)ccc1O2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.