You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (2R,3S,4S,5R,6R)-2-(hydroxymethyl)-6-[[(1S,5S,6R)-6-(hydroxymethyl)-6-methyl-2-bicyclo[3.1.1]heptanyl]methoxy]oxane-3,4,5-triol by IUPAC nomenclature, provide its molecular formula.
user
C16H28O7
assistant