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