You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (2S,3S,8R,9R,10R,13R,14S,16R,17S)-17-[(2R)-2,6-dihydroxy-6-methyl-3-oxoheptan-2-yl]-2,3,16-trihydroxy-4,4,9,13,14-pentamethyl-1,2,3,7,8,10,12,15,16,17-decahydrocyclopenta[a]phenanthren-11-one into its molecular formula.
user
C30H48O7
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