Using CON, COC(=O)c1c(ON2N=C(OC)C=C(OC)N2)cccc1C(C)=O to produce CON=C(C)c1cccc(ON2N=C(OC)C=C(OC)N2)c1C(=O)OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.