You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 4-ethyl-N-[4-(4-methoxyphenyl)-5-methyl-1,3-thiazol-2-yl]-2-methylpyrimidine-5-carboxamide .
user
C19H20N4O2S
assistant