You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 4-(2,4-dimethoxyphenyl)-N-(2-methylprop-2-enyl)-3-(pyridin-2-ylmethylideneamino)-1,3-thiazol-2-imine into its molecular formula.
user
C21H22N4O2S
assistant