You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (1R)-1-[4-[[(2R,4R,5R)-3,4-dihydroxy-6-(hydroxymethyl)-5-[(2S,4S,5R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]methylsulfonyl]phenyl]-7-hydroxy-2,7-diphenyl-2-azaspiro[3.5]nonan-3-one by IUPAC nomenclature, provide its molecular formula.
user
C39H47NO14S
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