Using CC(=O)OC(C)=O, CC(C)Nc1nc2cnccc2nc1N1CCN(C(=O)OC(C)(C)C)CC1 to produce CC(=O)N1CCc2nc(N3CCN(C(=O)OC(C)(C)C)CC3)c(NC(C)C)nc2C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.