You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name [(2S)-1-(cyclohexylmethylamino)-1-oxopropan-2-yl] 2,5-dimethyl-4-oxo-3H-thieno[2,3-d]pyrimidine-6-carboxylate into its molecular formula.
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C19H25N3O4S
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