Using CC(C)(C)OC(=O)NCCCC(=O)O, CON1C(=O)CC2(CCNCC2)C1=O to produce CON1C(=O)CC2(CCN(C(=O)CCCN)CC2)C1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.