You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3,3-dimethyl-N-[(5-methyl-1,3,4-oxadiazol-2-yl)methyl]-2-propan-2-ylbutanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C13H23N3O2
assistant