You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule methyl 2-[[2-[(17-hydroxy-10,13-dimethyl-1,2,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-3-ylidene)amino]oxyacetyl]amino]-3-(4-hydroxy-3-nitrophenyl)propanoate ?
user
C31H41N3O8
assistant