Using NC1c2ccccc2CSc2ccccc21, O=C(O)CCCN1CCN(c2ccc(F)cc2)CC1 to produce O=C(CCCN1CCN(c2ccc(F)cc2)CC1)NC1c2ccccc2CSc2ccccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.