You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (2R)-2-[[4-[(2S)-3-amino-1-oxo-1-(thieno[2,3-c]pyridin-2-ylamino)propan-2-yl]phenyl]methyl]-4,5-dinitrooxypentanoic acid by IUPAC nomenclature, provide its molecular formula.
user
C22H23N5O9S
assistant