Using CC(C)(C)OC(=O)Nc1ccc2c(c1)CC1(C2)C(=O)Nc2ccccc21 to produce Nc1ccc2c(c1)CC1(C2)C(=O)Nc2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.