You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[3,4-bis(ethenyl)phenyl]-1-[6-(7,7-dimethylindeno[2,1-b]carbazol-5-yl)-1,2-dihydropyridin-3-yl]-N-methyl-1-phenylmethanamine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C44H39N3
assistant