Using COC(=O)C1(C)CC2(CCN1C(=O)OC(C)(C)C)CC2 to produce CC(C)(C)OC(=O)N1CCC2(CC2)CC1(C)C(=O)O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.