You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[4-[(1-butyl-8-methyl-3,4-dihydro-2H-quinolin-7-yl)methylamino]-2-fluorophenyl]propanal is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H31FN2O
assistant