You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name 2-amino-2-(4-fluorophenyl)-1-[4-(1H-indazole-5-carbonyl)piperazin-1-yl]ethanone;2,2,2-trifluoroacetic acid ?
user
C22H21F4N5O4
assistant