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 (3aS,4R,7R,7aS)-2-phenyl-3a,4,7,7a-tetrahydro-4,7-epoxyisoindole-1,3-dione .
user
C14H11NO3
assistant