You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[4-[3-acetyl-1-[4-(hydroxymethyl)phenyl]-7-oxo-4,5-dihydropyrazolo[3,4-c]pyridin-6-yl]phenyl]-5-chloropentanamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H27ClN4O4
assistant