You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (2S)-N-[(2S)-1-[acetyl(ethyl)amino]-3-methylbutan-2-yl]-N,3,3-trimethyl-2-[[(2S)-3-methyl-2-(methylamino)-3-phenylbutanoyl]amino]butanamide;methyl acetate .
user
C31H54N4O5
assistant