You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-oxo-2-[(17S)-10,13,16,17-tetramethyl-3-methylidene-7,8,12,14,15,16-hexahydro-6H-cyclopenta[a]phenanthren-17-yl]ethyl] 4-cyclobutylidene-4-hydroxybutanoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C32H42O4
assistant