Using COc1cc(C(=O)N2CCC3(CC2)CC(=O)c2cc(Br)ccc2O3)nc2c(OC)cccc12, CN(C)C=O to produce COc1cc(C(=O)N2CCC3(CC2)CC(=O)c2cc(C#N)ccc2O3)nc2c(OC)cccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.