You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(3aS,4R,6R,6aS)-6-(1,2-dihydroxyethyl)-2,2-dimethyl-3a,4,6,6a-tetrahydrofuro[3,4-d][1,3]dioxol-4-yl] 2-methylpropanoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C13H22O7
assistant