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,4aS,7aR,12bS)-9-methoxy-3-methyl-4a-pentanoyloxy-1,2,4,5,7a,13-hexahydro-4,12-methanobenzofuro[3,2-e]isoquinolin-7-yl] pentanoate .
user
C28H37NO6
assistant