Using COc1ccc(Cn2c(C)nc3c(=O)c4ccccc4ccc32)cc1 to produce COc1ccc(Cn2c(C)nc3c2C=Cc2ccccc2C3O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.