Using O=C(OCc1ccccc1)N1CCN(NC2CCN(c3ccncc3)CC2)C(=O)C1 to produce O=C1CNCCN1NC1CCN(c2ccncc2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.