Using NCCCCCCc1ccccc1, O=C(O)CN1C(=O)CC1SCc1ccccc1 to produce O=C(CN1C(=O)CC1SCc1ccccc1)NCCCCCCc1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.