You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3aR,4S,5aS)-3a,4-dihydroxy-5a-methyl-4,5,6,8-tetrahydro-1H-furo[3,4-e][2]benzofuran-3-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C11H14O5
assistant