You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[4,6-dimethyl-2-(5-methyl-3,6-dihydro-2H-pyridin-1-yl)pyridin-3-yl]-N-methylmethanamine is the IUPAC name of a molecule. Please give its molecular formula.
user
C15H23N3
assistant