You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance [2-(4-methyl-3-nitroanilino)-2-oxoethyl] (2S)-2-[(1R,2R,6S,7R)-3,5-dioxo-4-azatricyclo[5.2.1.02,6]dec-8-en-4-yl]propanoate .
user
C21H21N3O7
assistant