You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as N-[1-(2-bicyclo[2.2.1]heptanyl)ethyl]-4-(2,3-dihydro-1,4-benzothiazin-4-yl)-4-oxobutanamide using the IUPAC nomenclature.
user
C21H28N2O2S
assistant