You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[2-[5-[(2-fluorophenyl)methyl]-6,7-dihydro-4H-pyrazolo[1,5-a]pyrazin-7-yl]ethyl]cyclopropanesulfonamide;2,2,2-trifluoroacetic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H24F4N4O4S
assistant