Using Cc1nc2n(c(=O)c1CCBr)CCS2, ON=C(c1ccc(F)cc1F)N1CCNCC1 to produce Cc1nc2n(c(=O)c1CCN1CCN(C(=NO)c3ccc(F)cc3F)CC1)CCS2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.