You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (2R,3R,4S,5S,6R)-2-[1-[(2S,4S,5R,6R)-5-hydroxy-4,6-dimethoxyoxan-2-yl]ethoxy]-6-(hydroxymethyl)oxane-3,4,5-triol by IUPAC nomenclature, provide its molecular formula.
user
C15H28O10
assistant