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system
Name the molecular formula for the molecule established as (5R,8S,9S,10R,13S,14S,17S)-17-acetyl-10,13-dimethyl-5,6,7,8,9,12,14,15,16,17-decahydro-4H-cyclopenta[a]phenanthrene-3,11-dione using the IUPAC nomenclature.
user
C21H28O3
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