Using C[Mg]Cl, CC(=O)c1c(F)cccc1Oc1cnc2c(F)c(F)ccc2c1 to produce CC(C)(O)c1c(F)cccc1Oc1cnc2c(F)c(F)ccc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.