Using O=Cc1c(F)c(F)c(F)c(F)c1F, COC(=O)CC(C)=O to produce O=C1C=C(O)CC(c2c(F)c(F)c(F)c(F)c2F)O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.