You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule [2-(2,4-dimethylanilino)-2-oxoethyl] (2S)-2-[(15R,19R)-16,18-dioxo-17-azapentacyclo[6.6.5.02,7.09,14.015,19]nonadeca-2,4,6,9,11,13-hexaen-17-yl]propanoate .
user
C31H28N2O5
assistant