You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (2S)-2-[[(2S,3R)-2-[[(2S)-2,4-diamino-4-oxobutanoyl]amino]-3-hydroxybutanoyl]amino]butanedioic acid .
user
C12H20N4O8
assistant