Using C1CNC1, CCN(C)c1nc2cc(NC(=O)c3c(C(=O)O)cnn3C)ccn2n1 to produce CCN(C)c1nc2cc(NC(=O)c3c(C(=O)N4CCC4)cnn3C)ccn2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.