You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by methyl 3,4,5-trihydroxy-6-[[(2S)-5-hydroxy-2-(2-hydroxyphenyl)-4-oxo-2,3-dihydrochromen-7-yl]oxy]oxane-2-carboxylate ?
user
C22H22O11
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