You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as (5R,7R,8R,9S,10S,13S,14S,17S)-17-hydroxy-7,10,13,17-tetramethyl-2,4,5,6,7,8,9,11,12,14,15,16-dodecahydro-1H-cyclopenta[a]phenanthren-3-one using the IUPAC nomenclature.
user
C21H34O2
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