Using CCOCC, O=C(O)/C=C\C(=O)Nc1ccc2c(=O)n3c(nc2c1)C(=Cc1ccccc1)CC3 to produce COC(=O)/C=C\C(=O)Nc1ccc2c(=O)n3c(nc2c1)C(=Cc1ccccc1)CC3, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.