You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 1-[(2R)-4-benzoyl-2-methylpiperazin-1-yl]-2-[4-(hydroxyamino)-1H-pyrrolo[2,3-b]pyridin-3-yl]ethane-1,2-dione is given. What is its corresponding molecular formula?
user
C21H21N5O4
assistant