You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-(4-ethylpiperazin-4-ium-1-yl)-4-(4-fluorophenyl)-8-thia-4,6-diazatricyclo[7.5.0.02,7]tetradeca-1(9),2(7),5-trien-3-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H28FN4OS+
assistant