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 (6S,8S)-8,12-diethoxy-3,7,11-trimethyl-4-methylidene-13-oxatetracyclo[5.5.3.01,8.02,6]pentadec-2-en-14-one .
user
C22H32O4
assistant