Using CC(=O)OC(C)=O, CCOC(=O)C(N)c1ccc(C(=O)O)cc1 to produce CCOC(=O)C(NC(C)=O)c1ccc(C(=O)O)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.