You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[1-[4-(2-cyanopropan-2-yl)phenyl]-8-pyridin-3-ylimidazo[4,5-c]quinolin-2-yl]cyanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H19N7
assistant