Using CS(=O)(=O)OCC1CN(c2ccc(C#N)cc2)C(=O)O1, CCOC(=O)C1CCNCC1 to produce CCOC(=O)C1CCN(CC2CN(c3ccc(C#N)cc3)C(=O)O2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.