You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 8-[2-(dimethylamino)ethyl-methylamino]-9-ethyl-6,6-dimethyl-5,11-dihydrobenzo[b]carbazole-3-carbonitrile into its molecular formula.
user
C26H32N4
assistant