Using NC(=O)OCC1c2c(O)cc(C=O)cc2N2CC3NC3C1(O)O2, CON to produce CON=Cc1cc(O)c2c(c1)N1CC3NC3C(O)(O1)C2COC(N)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.