Using CCCC(=O)CC(=O)OCC, [N-]=[N+]=Nc1ccc2c(c1)CCNC2=O to produce CCCc1c(C(=O)O)nnn1-c1ccc2c(c1)CCNC2=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.