You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R,3R,4R,5S,6R)-6-[[(2S,3S,4R,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxymethyl]oxane-2,3,4,5-tetrol is the IUPAC name of a molecule. Please give its molecular formula.
user
C12H22O11
assistant