You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(2S)-2,6-diaminohexyl] N-[(2S)-6-amino-1-[[(2S)-6-amino-1-carbamoyloxyhexan-2-yl]carbamoyloxy]hexan-2-yl]carbamate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H45N7O6
assistant