Using C1COCCO1, N#Cc1cc(-c2ccccc2)c2ccc(C(Br)Br)cc2n1 to produce N#Cc1cc(-c2ccccc2)c2ccc(C=O)cc2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.