You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-methyl-5-[[3-[3-(2-methylpyrimidin-4-yl)phenyl]pyrazol-1-yl]methyl]-1,3-thiazole is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H17N5S
assistant