Using CCOc1ccc(OB([O-])[O-])cc1, CN1CCC(C(=O)OC(C)(C)C)=Cc2cc(Br)ccc21 to produce CCOc1ccc(-c2ccc3c(c2)C=C(C(=O)OC(C)(C)C)CCN3C)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.