You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-[4-[1-methyl-5-(4-methylpiperazine-1-carbonyl)-2,3-dihydro-1-benzazepin-1-ium-1-carbonyl]phenyl]-2-(4-methylphenyl)benzamide by IUPAC nomenclature, provide its molecular formula.
user
C38H39N4O3+
assistant