Using CCCN1C(=O)N(N=CC(O)C2CCCCC2)C2CC(SCCCC(=O)O)CC21 to produce CCCN1C(=O)N(NCC(O)C2CCCCC2)C2CC(SCCCC(=O)O)CC21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.