Using CC(C)(C)OC(=O)N1CCCN(c2nc3ccccc3n2CCOCC(F)(F)F)CC1 to produce FC(F)(F)COCCn1c(N2CCCNCC2)nc2ccccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.