You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as [(4S,4aR,5S,8S,8aS)-4-acetyloxy-3,4a,5-trimethyl-9-oxo-4,5,6,7,8,8a-hexahydrobenzo[f][1]benzofuran-8-yl] 2-methylpropanoate using the IUPAC nomenclature.
user
C21H28O6
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