Using CI, COc1ccccc1-c1nnc2ccc(-c3ccc(NC(=O)C(C)(C)C)cc3)cn12 to produce COc1ccccc1-c1nnc2ccc(-c3ccc(N(C)C(=O)C(C)(C)C)cc3)cn12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.