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