You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(1R,5S)-8-(4-methylpyridine-3-carbonyl)-8-azabicyclo[3.2.1]octan-3-yl]pyridine-4-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H22N4O2
assistant