Using O=C(Cl)C(Br)CBr, COCC1CNC(c2ccc(Cl)cc2)O1 to produce COCC1CNC(C(=O)C(Br)CBr)(c2ccc(Cl)cc2)O1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.