Using NCCCn1ccnc1, O=C(O)COc1ccc(OCc2ccccc2)cc1 to produce O=C(COc1ccc(OCc2ccccc2)cc1)NCCCn1ccnc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.