You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule [(1R,2R,3S,3aS,3bR,9aR,9bS,11aS)-1-acetyl-2-bromo-5-chloro-1-hydroxy-9a,11a-dimethyl-7-oxo-2,3,3a,3b,9,9b,10,11-octahydroindeno[7,6-h]isochromen-3-yl] acetate .
user
C22H26BrClO6
assistant