You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[4-[2-[3-[[(4S)-4-methyl-2-[(4-nitrophenyl)methoxycarbonyl]-7-oxo-6-[(1R)-1-triethylsilyloxyethyl]-1-azabicyclo[3.2.0]hept-2-en-3-yl]methyl]-2,2-dioxo-2lambda6-thia-3-azatricyclo[6.3.1.04,12]dodeca-1(12),4,6,8,10-pentaen-9-yl]ethyl]-1,4-diazoniabicyclo[2.2.2]octan-1-yl]acetic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C44H57N5O10SSi+2
assistant