You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
cyclobutyl-[(2S)-2-[3-(3-methylphenyl)-1,2,4-oxadiazol-5-yl]piperidin-1-yl]methanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H23N3O2
assistant