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 2-[[(2R)-2-[[(2S)-6-amino-2-[[(2S)-2-amino-3-methylbutanoyl]amino]hexanoyl]amino]-3-sulfanylpropanoyl]amino]acetic acid .
user
C16H31N5O5S
assistant