Using NCCN1CCCC1, O=C(O)CCc1csc(Nc2ncccc2OCc2ccccc2)n1 to produce O=C(CCc1csc(Nc2ncccc2OCc2ccccc2)n1)NCCN1CCCC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.