You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-[(8R,9S,10S,13R,17R)-10,13-dimethyl-16-oxo-1,2,3,4,5,6,7,8,9,11,12,17-dodecahydrocyclopenta[a]phenanthren-17-yl]-2-oxoethyl] 2,2-dimethylpropanoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H38O4
assistant