You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name tert-butyl 2-(6-cyclopropyloxypyridin-3-yl)sulfanyl-4,6-dihydropyrrolo[3,4-c]pyrazole-5-carboxylate into its molecular formula.
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C18H22N4O3S
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