You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [(1R,2E,8S,10R,11S)-6-(acetyloxymethyl)-10,11-dihydroxy-1,10-dimethyl-5-oxo-4,14-dioxatricyclo[9.2.1.03,7]tetradeca-2,6-dien-8-yl] 2-(hydroxymethyl)prop-2-enoate by IUPAC nomenclature, provide its molecular formula.
user
C21H26O10
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