Using CCC(=O)C1=C(O)CC(c2c(C)cc(C)c(Br)c2C)CC1=O, C=CCON to produce C=CCON=C(CC)C1=C(O)CC(c2c(C)cc(C)c(Br)c2C)CC1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.