You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named ethylcarbamic acid;[2-[(8S,10R,13S,16S)-11-hydroxy-10,13,16-trimethyl-3-oxo-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthren-17-yl]-2-oxoethyl] acetate by IUPAC nomenclature, provide its molecular formula.
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C27H39NO7
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