Using CC(C)(C)OC(=O)N1CCNC(C(=O)O)C1, CC(=O)O[BH-](OC(C)=O)OC(C)=O to produce CN1CCN(C(=O)OC(C)(C)C)CC1C(=O)O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.