You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name [2-methoxy-4-[(2S,3R)-5-methoxy-2-methyl-9-oxo-2,3-dihydropyrano[3,2-h][1,4]benzodioxin-3-yl]phenyl] acetate into its molecular formula.
user
C22H20O8
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