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What is the molecular formula of the compound with this IUPAC name 1-[(8S,9S,10R,13S,14S,17S)-3-amino-10,13-dimethyl-2,3,4,7,8,9,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl]ethanol ?
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C21H35NO
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