You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name cyclopropyl-[4-(2-cyclopropyl-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-yl)piperazin-1-yl]methanone into its molecular formula.
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C21H26N4OS
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