You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule N-[3-(2-amino-4-methyl-5,6-dihydro-1,3-thiazin-4-yl)-4-fluorophenyl]-5-bromo-1-benzothiophene-3-carboxamide .
user
C20H17BrFN3OS2
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