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 5-[[(8R,9S,13S,14S,17S)-17-(3-carboxypropanoyloxy)-13-methyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthren-3-yl]oxy]-5-oxopentanoic acid .
user
C27H34O8
assistant