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-(2-amino-1-formamidoethyl)-2-(1-formamido-2-oxoethyl)-3,5-dimethyl-2,6-dihydro-1,3-thiazine-4-carboxamide .
user
C13H21N5O4S
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