You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl 8,9,10,11-tetrafluoro-2,3,13,20-tetrazapentacyclo[11.7.0.02,6.07,12.014,19]icosa-1(20),3,5,7(12),8,10,14,16,18-nonaene-5-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H10F4N4O2
assistant