Using CC(C)(C)OC(=O)N(CCCl)CCCl, CCOC(=O)C1(N)CC1 to produce CCOC(=O)C1(N2CCN(C(=O)OC(C)(C)C)CC2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.