Using CN1C(=O)N(CCC(=O)O)C(C)(C)C1=O, COC(CN)OC to produce COC(CNC(=O)CCN1C(=O)N(C)C(=O)C1(C)C)OC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.