Using CCOC(=O)C=[N+]=[N-], COCC1(C)OC(C)(C)C(=O)C1=O to produce CCOC(=O)C1C(=O)C(C)(C)OC(C)(COC)C1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.