You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-(3,4-dihydro-1H-isoquinolin-2-yl)-N-[(3-methyl-2-methylsulfanylimidazol-4-yl)methyl]propanamide into its molecular formula.
user
C18H24N4OS
assistant