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-thiophen-2-ylethyl)-4a,5,6,7,8,8a-hexahydro-4H-3,1-benzothiazin-2-amine using the IUPAC nomenclature.
user
C14H20N2S2
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