Using CC(C)(C)OC(=O)N1CCC(CNC(=O)C(F)(F)F)(NC(=O)C(F)(F)F)CC1 to produce O=C(NCC1(NC(=O)C(F)(F)F)CCNCC1)C(F)(F)F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.