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 tert-butyl (3aR)-2-[2-(2-methylphenoxy)ethyl]-1,1-dioxo-3a,4,6,7-tetrahydro-3H-[1,2,5]thiadiazolo[2,3-a]pyrazine-5-carboxylate .
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C19H29N3O5S
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