You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[5-(4-chlorophenyl)-1,3,4-oxadiazol-2-yl]-1-[4-hydroxy-4-(pyridin-4-ylmethyl)piperidin-1-yl]propan-1-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H23ClN4O3
assistant