You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as 1-[(4R,4aS,7R,7aR,12bS)-3-(benzenesulfonyl)-4a-hydroxy-9-methoxy-1,2,4,5,6,7,7a,13-octahydro-4,12-methanobenzofuro[3,2-e]isoquinolin-7-yl]-1-methyl-3-phenylurea using the IUPAC nomenclature.
user
C31H33N3O6S
assistant