You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule ethyl 2-[[2-(2-methyl-4-oxo-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-3-yl)acetyl]amino]-4-(4-methylphenyl)thiophene-3-carboxylate .
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C27H27N3O4S2
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