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What is the molecular formula of the compound with this IUPAC name 1-ethoxyethyl (4S)-4-(3-hydroxy-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl)pentanoate ?
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C28H48O4
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