You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl 4-[5-amino-6-(6-methyl-1H-benzimidazol-2-yl)pyrazin-2-yl]-3,6-dihydro-2H-pyridine-1-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H26N6O2
assistant