You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule (3aR,5aR,9R,9aS,9bS)-2-tert-butyl-9-hydroxy-4,5,5a,9,9a,9b-hexahydro-3aH-benzo[e]isoindole-1,3,6-trione ?
user
C16H21NO4
assistant