You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R)-2-[4-[(1S)-1-(3-methyl-1,2,4-oxadiazol-5-yl)ethyl]piperazin-1-yl]-2-phenylacetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H23N5O2
assistant