You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[4-[7-chloro-8-(2-phenylethenyl)imidazo[4,5-c]quinolin-1-yl]phenyl]propan-1-amine is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H23ClN4
assistant