Using CCOC(=O)CBr, CS(=O)(=O)CCNC(=O)C(F)(F)F to produce CCOC(=O)CN(CCS(C)(=O)=O)C(=O)C(F)(F)F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.