You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl (4S)-4-[(8S,9S,10R,13R,14R,17S)-10,13-dimethyl-3-oxo-1,2,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-17-yl]pentanoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H40O3
assistant