Using CCCOc1ccc(OB([O-])[O-])cc1, COC(=O)C1=Cc2cc(Br)ccc2N(C(=O)OC(C)(C)C)CC1 to produce CCCOc1ccc(-c2ccc3c(c2)C=C(C(=O)OC)CCN3C(=O)OC(C)(C)C)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.