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