You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 3-methyl-N-[(1S,2R)-2-methyl-1-[3-[4-(trifluoromethyl)phenyl]-1,2,4-oxadiazol-5-yl]butyl]butanamide by IUPAC nomenclature, provide its molecular formula.
user
C19H24F3N3O2
assistant