You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule [(3R,8S,9R,10S,11R,14S,16S)-3,11-dihydroxy-4,10,14-trimethyl-17-[6-methyl-1-(methylamino)-1-oxoheptan-2-yl]-2,3,4,5,6,7,8,9,11,12,13,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-16-yl] acetate into molecular formula.
user
C31H53NO5
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