You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-imidazo[2,1-b][1,3]thiazol-6-yl-1-(4,5,6,7-tetrahydro-1-benzothiophen-2-yl)ethyl]hydrazine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C15H18N4S2
assistant