You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule (2E,4E,6E)-6-fluoro-3-methyl-7-(8-propyl-1,2,3,4-tetrahydroquinolin-6-yl)octa-2,4,6-trienal ?
user
C21H26FNO
assistant