You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (8S,11R,13S,14S,17S)-13-methyl-17-nitro-11-(4-piperidin-1-ylphenyl)-17-prop-1-ynyl-1,2,6,7,8,11,12,14,15,16-decahydrocyclopenta[a]phenanthren-3-one by IUPAC nomenclature, provide its molecular formula.
user
C32H38N2O3
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