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system
Name the molecular formula for the molecule established as 4-[4-[(8R,9S,10R,11S,13S,14S,17R)-17-ethynyl-17-hydroxy-13-methyl-3-oxo-1,2,6,7,8,9,10,11,12,14-decahydrocyclopenta[a]phenanthren-11-yl]phenyl]benzonitrile using the IUPAC nomenclature.
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C33H31NO2
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