You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-[(3R,8S,9R,10R,13R,14S,16R,17R)-3-[(2S,4S,5R)-4,5-dihydroxy-3-[(2R,3S,4S,5S,6R)-3,4,5-trihydroxy-6-methyloxan-2-yl]oxyoxan-2-yl]oxy-16-hydroxy-4,4,9,13,14-pentamethyl-11-oxo-1,2,3,7,8,10,12,15,16,17-decahydrocyclopenta[a]phenanthren-17-yl]-5-propan-2-ylfuran-3-one;ethane into molecular formula.
user
C42H66O13
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