You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 4-O-[(8S,9R,10S,11S,13S,14S,16S,17R)-9-fluoro-11-hydroxy-10,13,16-trimethyl-17-(2-methylsulfonyloxyacetyl)-3,6-dioxo-8,11,12,14,15,16-hexahydro-7H-cyclopenta[a]phenanthren-17-yl] 1-O-methyl butanedioate by IUPAC nomenclature, provide its molecular formula.
user
C28H35FO11S
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