You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 4-[6-(cyclobutadienyl)-4,5,7,8-tetrahydro-[1,3]thiazolo[4,5-d]azepin-2-yl]-N,N-dimethylaniline into its molecular formula.
user
C19H21N3S
assistant