You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 5-(2-oxo-1,3,3a,4,6,6a-hexahydrothieno[3,4-d]imidazol-4-yl)-N-[2-[2-[2-[2-(3-oxopropoxy)ethoxy]ethoxy]ethoxy]ethyl]pentanamide by IUPAC nomenclature, provide its molecular formula.
user
C21H37N3O7S
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