Using C1CCNC1, CC(C)(C)OC(=O)N1CCN(c2cccc(C(F)(F)F)c2C=O)CC1 to produce CC(C)(C)OC(=O)N1CCN(c2cccc(C(F)(F)F)c2CN2CCCC2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.