You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 3-[(8S,13S,14S,17S)-17-hydroxy-10,13-dimethyl-3-oxo-2,8,12,14,15,16-hexahydro-1H-cyclopenta[a]phenanthren-17-yl]propanoic acid .
user
C22H28O4
assistant