You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(4-aminopiperidin-1-yl)-[3-[5-methyl-6-(1,2,4-triazol-4-yl)pyridin-3-yl]phenyl]methanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H22N6O
assistant