You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule methyl (4R)-4-[(3R,5S,8S,9R,10S,12S,13R,14S,17S)-3,12-dihydroxy-10,13-dimethyl-7-oxo-1,2,3,4,5,6,8,9,11,12,14,15,16,17-tetradecahydrocyclopenta[a]phenanthren-17-yl]pentanoate into molecular formula.
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C25H40O5
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