You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-tert-butyl-N-[2-methyl-3-[4-methyl-5-oxo-6-[4-(piperazine-1-carbonyl)anilino]pyrazin-2-yl]phenyl]pyridine-3-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C33H37N7O3
assistant