You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named (4R)-4-[(3R,8S,9S,10R,13R,14S,17R)-3,6-dihydroxy-6,10,13-trimethyl-1,2,3,4,5,7,8,9,11,12,14,15,16,17-tetradecahydrocyclopenta[a]phenanthren-17-yl]pentanoic acid is given. What is its corresponding molecular formula?
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C25H42O4
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