Using O=P(Cl)(Cl)Cl, CCn1c(=O)[nH]c2c(Br)c(F)ccc2c1=O to produce CCn1c(Cl)nc2c(Br)c(F)ccc2c1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.