You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (8R,9S,13R,14S,15S)-15-(2-hydroxy-N-methylanilino)-13-methyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthrene-1,2-diol into its molecular formula.
user
C25H31NO3
assistant