You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[[5-[(E)-[(6-methylimidazo[2,1-b][1,3]thiazole-5-carbonyl)hydrazinylidene]methyl]furan-2-yl]methyl]-N'-phenyloxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H18N6O4S
assistant