Using O=P(Br)(Br)Br, CCCCOC(=O)c1nc(O)c2c(-c3ccc(F)cc3)csc2c1O to produce CCCCOC(=O)c1nc(Br)c2c(-c3ccc(F)cc3)csc2c1O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.