You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 4-[[(3aR,8aS)-2-(2,3-dihydro-1-benzofuran-5-ylsulfonyl)-1,3,3a,4,5,7,8,8a-octahydropyrrolo[3,4-d]azepin-6-yl]methyl]-2-methyl-1,3-thiazole .
user
C21H27N3O3S2
assistant