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 12-acetyl-5,7,10,16,19,21-hexamethoxy-13-methylhexacyclo[13.8.0.02,11.03,8.04,22.018,23]tricosa-1(23),2,4(22),5,7,10,12,15,18,20-decaene-9,17-dione .
user
C32H28O9
assistant