You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name [(3aR)-10-methoxy-5-(4-methylphenyl)sulfonyl-6-oxo-2,3,3a,4-tetrahydro-1H-pyrrolo[1,2-a][1,4]benzodiazepin-7-yl] trifluoromethanesulfonate into its molecular formula.
user
C21H21F3N2O7S2
assistant