You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R,3R,5E,7S)-3,7-dihydroxy-2-methyl-2,3,4,7,8,9-hexahydrooxecin-10-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C10H16O4
assistant