You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(6aS,8S)-2-(1,3-benzodioxol-5-yl)-6,11-dioxo-6a,7,8,9-tetrahydro-5H-pyrrolo[2,1-c][1,4]benzodiazepin-8-yl]benzamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H21N3O5
assistant