You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named [(1S,2S,5S,8R,9S,10S,11R,18R)-9,10-dihydroxy-12,12-dimethyl-6-methylidene-7,15-dioxo-17-oxapentacyclo[7.6.2.15,8.01,11.02,8]octadecan-18-yl] 4-chlorobenzoate is given. What is its corresponding molecular formula?
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C27H29ClO7
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