Using CSc1ccc(NC(=O)NC(C)(C)C(=O)OC(C)(C)C)cc1C(F)(F)F to produce CSc1ccc(N2C(=O)NC(C)(C)C2=O)cc1C(F)(F)F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.