You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[2-(2,5-dimethoxyanilino)-1,3-thiazol-4-yl]-N-(pyridin-3-ylmethyl)acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H20N4O3S
assistant