You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule (2S)-N-[[2,2-dimethyl-1-(5-phenyl-1,2,4-oxadiazol-3-yl)propyl]carbamoyl]-N,2-dihydroxy-5-methylhexanamide ?
user
C21H30N4O5
assistant