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What is the molecular formula of the molecule identified by [(1S,2S,3R,5S,8S,9Z,11R,13S,14S,15S,17S,19R)-2,13,15-triacetyloxy-5,10,14,19-tetramethyl-6-oxo-4,7,18-trioxapentacyclo[12.5.0.03,5.03,8.017,19]nonadec-9-en-11-yl] acetate ?
user
C28H36O12
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