Using CC(C)(C)OC(=O)N1CCC(=O)CC1, CCOP(=O)(Cc1cccc(Br)c1CC)OCC to produce CCc1c(Br)cccc1C=C1CCN(C(=O)OC(C)(C)C)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.