Using CCOc1cccc(C=C2CCc3c2nc2ccc(C(=O)O)cn2c3=O)c1 to produce O=C(O)c1ccc2nc3c(c(=O)n2c1)CCC3=Cc1cccc(O)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.