You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (8R,9S,13S,14S)-17-hydroxyimino-2-methoxy-13-methyl-6-(3-nitrophenoxy)imino-7,8,9,11,12,14,15,16-octahydrocyclopenta[a]phenanthren-3-ol .
user
C25H27N3O6
assistant