You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
10-[(E)-3-fluoro-2-(methylamino)-4-methyliminobut-2-enyl]-7-methyl-4-(1H-pyrazol-5-ylmethyl)-3-thia-5,7,10,11-tetrazatricyclo[6.4.0.02,6]dodeca-1(8),2(6),4,11-tetraen-9-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H19FN8OS
assistant