You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule [(1S,4S,7R,9S,10R,11R,12R,15S)-4-acetyloxy-1,11,15-trihydroxy-9,10,12,14,17,17-hexamethyl-6-oxatetracyclo[11.3.1.03,10.04,7]heptadec-13-en-2-yl] benzoate .
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