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 methyl (4R)-4-[(8S,9S,10R,13R,14S,17R)-10,13-dimethyl-3,7-dioxo-2,4,8,9,11,12,14,15,16,17-decahydro-1H-cyclopenta[a]phenanthren-17-yl]pentanoate .
user
C25H36O4
assistant