You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-(2-benzoylhydrazinyl)-2-oxoethyl] (2R)-2-[(1S,2S,6S,7S)-3,5-dioxo-4-azatricyclo[5.2.1.02,6]decan-4-yl]propanoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H23N3O6
assistant