You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 1-[(5R,8R,9S,10S,13S,14S,17S)-10,13-dimethylspiro[1,2,3,4,5,6,7,8,9,11,14,15,16,17-tetradecahydrocyclopenta[a]phenanthrene-12,2'-1,3-dithiolane]-17-yl]ethanone into molecular formula.
user
C23H36OS2
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