Using NC(=O)CC[C@H](N)C(=O)O, CCCCC(CC)CN=C=O to produce CCCCC(CC)CNC(=O)N[C@@H](CCC(N)=O)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.