You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-[(8R,9R,10R,11S,13S,14R,17S)-17-acetyloxy-11-hydroxy-10,13-dimethyl-3-oxo-2,6,7,8,9,11,12,14,15,16-decahydro-1H-cyclopenta[a]phenanthren-17-yl]-2-oxoethyl] acetate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C25H34O7
assistant