Using CCOC(=O)CCl, CC(C)(C)OC(=O)N1CCN(c2cc3nc[nH]c3c(=O)[nH]2)CC1 to produce CCOC(=O)Cn1cnc2cc(N3CCN(C(=O)OC(C)(C)C)CC3)[nH]c(=O)c21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.