You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (1R,2S,3S,4R,7R,10S,13S,17S)-13,17-dihydroxy-4-methyl-14-methylidene-5-oxo-6-oxapentacyclo[11.2.1.14,7.01,10.03,9]heptadec-8-ene-2-carboxylic acid into molecular formula.
user
C19H22O6
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