Using CC1=C(O)C(=Nc2ccc(N)cc2)C=C(Nc2ccc(N)cc2)C1=O to produce Cc1c(O)c(Nc2ccc(N)cc2)cc(Nc2ccc(N)cc2)c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.