Using O=C(OCC(Cl)(Cl)Cl)OC1CN(C(=O)OCC(Cl)(Cl)Cl)CCC1c1ccc(Br)cc1 to produce OC1CNCCC1c1ccc(Br)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.