You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by [2-[(8S,9S,10R,13S,14S,17S)-10,13-dimethyl-3-oxo-2-(propoxymethoxy)-1,2,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-17-yl]-2-oxoethyl] acetate ?
user
C27H40O6
assistant