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 (4R,4aR,12bS)-9-(1-hydroxy-1-phenylpropan-2-yl)oxy-3-prop-2-enyl-1,2,4,4a,5,6,7a,13-octahydro-4,12-methanobenzofuro[3,2-e]isoquinolin-7-one .
user
C28H31NO4
assistant