You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [(1S,2R,3R,4R,11R,12R,18R,20S)-4,10,12,18-tetramethyl-6,16-dioxo-7,15-di(propan-2-ylidene)-20-pentacyclo[10.7.1.02,11.03,9.013,19]icosa-9,13(19)-dienyl] acetate by IUPAC nomenclature, provide its molecular formula.
user
C32H42O4
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