Using O=C1CCC(=O)N1Br, Cc1cc(Cl)c(C(Cl)=C(Cl)Cl)c(Cl)c1 to produce ClC(Cl)=C(Cl)c1c(Cl)cc(CBr)cc1Cl, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.