You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[6-[(2-butan-2-yl-1,3-dioxoisoindol-4-yl)amino]-6-oxohexyl]-tris(4-methylphenyl)phosphanium;bromide is the IUPAC name of a molecule. Please give its molecular formula.
user
C39H44BrN2O3P
assistant