You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 1-[(3R,5R,8R,9R,10S,11R,13S,14R,16R,17R)-3,11,17-trihydroxy-10,13,16-trimethyl-1,2,3,4,5,6,7,8,9,11,12,14,15,16-tetradecahydrocyclopenta[a]phenanthren-17-yl]ethanone into its molecular formula.
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C22H36O4
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