You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(3S,10R,13S)-10,13-dimethyl-17-[2-(methylamino)anilino]-2,3,4,7,8,9,11,12,14,15-decahydro-1H-cyclopenta[a]phenanthren-3-yl] 2-amino-3-methylbutanoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C31H45N3O2
assistant