Using CC1(C)OC(=O)CC(=O)O1, CC(C)(C)OC(=O)NC(C(=O)O)C1CC1 to produce CC(C)(C)OC(=O)N1C(=O)CC(=O)[C@@H]1C1CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.