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 N-[(4R,4aR,7S,7aR,12bS)-11-hydroxy-9-methoxy-3-prop-2-enyl-2,4,4a,5,6,7,7a,13-octahydro-1H-4,12-methanobenzofuro[3,2-e]isoquinolin-7-yl]-8-phenyl-N-(4-phenylbutyl)octanamide .
user
C44H56N2O4
assistant