Using CCc1nn2c(C)cc(C)nc2c1Cc1ccc(/C=C/CO)cc1 to produce CCc1nn2c(C)cc(C)nc2c1Cc1ccc(/C=C/C=O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.