Using CC[C@H]1CCN[C@@H]1C(C(=O)OC(C)(C)C)N1CCC[C@H]1C(=O)O, COC(=O)[C@@H](N)CCSC to produce CC[C@H]1CCN[C@@H]1C(C(=O)OC(C)(C)C)N1CCC[C@H]1C(=O)N[C@@H](CCSC)C(=O)OC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.