You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1S,2R,9S,10S,11S,12S,16R)-9-ethyl-14-(4-fluorophenyl)-9-methyl-3,7-dithia-5,14-diazapentacyclo[9.5.1.02,10.04,8.012,16]heptadec-4(8)-ene-6,13,15-trione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H21FN2O3S2
assistant