You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (3R,8S,9S,11S,13S,14S,16R,17S)-17-ethynyl-13,16-dimethyl-11-prop-2-enyl-2,3,4,6,7,8,9,11,12,14,15,16-dodecahydro-1H-cyclopenta[a]phenanthrene-3,17-diol .
user
C24H34O2
assistant