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 identified by (3R,4aS,8aR)-3-[2-[(1'S,3'R,8R,11S)-11-[(3S)-5-[2-amino-5-(2H-pyrrol-4-ylmethyl)pyridin-4-yl]-3-hydroxypentyl]-2,3'-dihydroxy-3-methoxy-7-oxospiro[9,10-didehydro-6,11-dihydro-5H-benzo[9]annulene-8,4'-cyclohexane]-1'-yl]ethyl]spiro[1,3,4,4a,5,6,8,8a-octahydroquinoline-2,1'-cyclohexane]-7-one ?
user
C50H66N4O6
assistant