You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[1-[(6-methylpyridin-2-yl)methyl]-4-(3-pyrazol-1-ylpropyl)piperazin-2-yl]ethanol is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H29N5O
assistant