You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-[(2S,4aR,4bS,8aS)-2,4b,8,8-tetramethyl-7-[3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-4,4a,5,6,7,8a,9,10-octahydro-3H-phenanthren-2-yl]-2-hydroxyethyl] acetate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C28H46O9
assistant