Using CCCCCCC, CCOC(=O)Cn1c2c(c3cccc(Br)c31)CC(N)CC2 to produce C=CCc1cccc2c3c(n(CC(=O)OCC)c12)CCC(N)C3, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.