You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule N-(4-ethyl-5-methyl-1,3-thiazol-2-yl)-2-[3-(4-methylsulfanylphenyl)-6-oxopyridazin-1-yl]acetamide .
user
C19H20N4O2S2
assistant