Using CCN=C=O, Fc1ccc(C(CCCN2CCNNCC2)c2ccc(F)cc2)cc1 to produce CCNC(=O)N1CCN(CCCC(c2ccc(F)cc2)c2ccc(F)cc2)CCN1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.