You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name N-(1-amino-2,4-dimethylpentan-2-yl)-4-[3-(4-methoxyphenyl)-1,2,4-oxadiazol-5-yl]butanamide ?
user
C20H30N4O3
assistant