Using CC(C)(C)OC(=O)N1CCC(C#N)(c2ccc(Br)cc2)CC1, CO to produce CC(C)(C)OC(=O)N1CCC(CC=O)(c2ccc(Br)cc2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.