You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (E,6S)-6-[(3R,10R,13S,14S,17S)-3-hydroxy-4,4,10,13,14-pentamethyl-2,3,5,6,12,15,16,17-octahydro-1H-cyclopenta[a]phenanthren-17-yl]-2-methylhept-2-enoic acid by IUPAC nomenclature, provide its molecular formula.
user
C30H46O3
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