You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (3R,3aS,7aS)-2-benzyl-3-(2-phenyl-1H-indol-3-yl)-3a,4,5,6,7,7a-hexahydro-3H-isoindol-1-one .
user
C29H28N2O
assistant