Using O=C1CCC(=O)N1Br, N#Cc1ccc(C=C2Cc3ccccc3C2=O)cc1 to produce N#Cc1ccc(C=C2C(=O)c3ccccc3C2Br)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.