Using O=C(NCCO)c1ccc(OCC2(O)CCN(Cc3ccccc3)CC2)cc1 to produce O=C(NCCO)c1ccc(OCC2(O)CCNCC2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.