You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (2S)-N-[(2S)-1-amino-1-oxopropan-2-yl]-5-(diaminomethylideneamino)-2-[[2-(3-methylbutanoylamino)acetyl]amino]pentanamide into its molecular formula.
user
C16H31N7O4
assistant