Using NC1CCCCC1, O=C(O)Cc1ccc2[nH]cc(CCN3C(=O)c4ccccc4C3=O)c2c1 to produce O=C(Cc1ccc2[nH]cc(CCN3C(=O)c4ccccc4C3=O)c2c1)NC1CCCCC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.