Using CCCc1ccc2c(c1)CCc1c-2ccc(-c2cc(F)c(F)c(F)c2)c1F to produce CCCc1ccc2c(ccc3c(F)c(-c4cc(F)c(F)c(F)c4)ccc32)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.