You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S)-2-[[(2S)-2-[[2-[[(2S)-2-[[2-[[(2S)-2-amino-3-methylbutanoyl]amino]acetyl]amino]-3-methylbutanoyl]amino]acetyl]amino]-3-methylbutanoyl]amino]propanoic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H40N6O7
assistant