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 2-[(3aR,7aR)-1,3-dioxo-3a,4,5,6,7,7a-hexahydroisoindol-2-yl]-N-(2-methyl-1,3-benzothiazol-6-yl)acetamide ?
user
C18H19N3O3S
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