You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R,3S,4R)-3,4,5-trihydroxy-2-[(3R,4S,5R)-3,4,5-trihydroxyoxan-2-yl]oxypentanal is the IUPAC name of a molecule. Please give its molecular formula.
user
C10H18O9
assistant