InChI=1/C7H2F9N4O/c8-5(9,10)4(6(11,12)13,7(14,15)16)2(21)19-3-17-1-18-20-3/h1H,(H-,17,18,19,20,21)/q-1/f/h21H 18E22CF2F5C17F34