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 N-[(2-chlorophenyl)methyl]-6-[1-[(2-fluorophenyl)methyl]-2,4-dioxo-4a,7a-dihydrothieno[3,2-d]pyrimidin-3-yl]hexanamide .
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C26H27ClFN3O3S
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