You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[4-(6-methyl-4,5,6,7-tetrahydro-1,3-benzothiazol-2-yl)piperazin-1-yl]butan-2-amine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C16H28N4S
assistant