You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 3-hydroxy-N-[(2-imidazol-1-ylpyridin-4-yl)methyl]-4-methylpiperidine-1-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C16H21N5O2
assistant