You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl 2-[(1S,4S,10S,13R,16S)-14-(aminomethyl)-2,5,8,11,20-pentaoxo-4-[3-(prop-1-en-2-ylamino)propyl]-3,6,9,12,19-pentazatricyclo[11.5.2.016,19]icosan-10-yl]acetate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C28H45N7O7
assistant