You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name [(3Z)-2-oxo-3-(1,3,3-trimethylindol-2-ylidene)propyl] 2-(2-oxoazepan-1-yl)acetate ?
user
C22H28N2O4
assistant