You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-methyl-2-[1-(2-methyl-6-pyrazol-1-ylpyrimidin-4-yl)azetidin-3-yl]benzimidazole by IUPAC nomenclature, provide its molecular formula.
user
C19H19N7
assistant