You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 3-N-(3-chloro-4-fluorophenyl)-5-N-[(6-methoxy-1,3-benzothiazol-2-yl)methyl]-2-methyl-1,1-dioxo-1,2,6-thiadiazinane-3,5-dicarboxamide ?
user
C21H21ClFN5O5S2
assistant