You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[2-[(4-methylpyridin-2-yl)amino]-1,3-thiazol-4-yl]-N-(4-methyl-1,3-thiazol-2-yl)acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C15H15N5OS2
assistant