Using COC(=O)C1CCN(C(=O)OC(C)(C)C)CC1, CC(C)(C)OC(=O)NCC=O to produce COC(=O)C1(C(O)CNC(=O)OC(C)(C)C)CCN(C(=O)OC(C)(C)C)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.