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 (2R,4aR,6aR,6aS,14aS,14bS)-10-hydroxy-2,6a,6a,9,14a-pentamethyl-4a-[(5-methyl-2-oxo-1,3-dioxol-4-yl)oxycarbonyl]-11-oxo-1,3,4,5,6,13,14,14b-octahydropicene-2-carboxylic acid .
user
C33H38O9
assistant