You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance tert-butyl 4-[4-[6-(pyrazin-2-ylamino)-4-(pyridin-3-ylcarbamoyl)pyridin-2-yl]pyridin-2-yl]piperazine-1-carboxylate .
user
C29H31N9O3
assistant