Using CC(C)(C)OC(=O)N1CCN2c3ncccc3N(C(=O)C3CC3)CCC2C1 to produce O=C(C1CC1)N1CCC2CNCCN2c2ncccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.