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What is the molecular formula of the molecule [2-[(17R)-9-chloro-11-hydroxy-10,13,16-trimethyl-3-oxo-17-prop-2-ynoyloxy-6,7,8,11,12,14,15,16-octahydrocyclopenta[a]phenanthren-17-yl]-2-oxoethyl] prop-2-ynoate ?
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C28H29ClO7
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