You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(2R,3R,5R)-5-[(8R)-6-acetyl-8-acetyloxy-7,8-dihydroimidazo[4,5-d][1,3]diazepin-3-yl]-3-acetyloxy-4-chlorooxolan-2-yl]methyl acetate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H23ClN4O8
assistant