Using CCCCOC(=O)[C@H]1CC[C@@H](CNC(=O)OC(C)(C)C)CC1 to produce CC(C)(C)OC(=O)NC[C@H]1CC[C@@H](C(=O)O)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.