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 (1S,4S,4aR,7S,7aR,11aS)-8-(1H-indol-3-yl)-4,4a,7-trimethyl-9-prop-1-en-2-yl-1,2,3,4,5,6,7,7a,8,9,10,11-dodecahydrobenzo[i]naphthalen-1-ol .
user
C28H39NO
assistant