You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule 1-[(3R)-3-(5H-pyrrolo[2,3-b]pyrazin-2-ylmethyl)pyrrolidin-1-yl]prop-2-en-1-one;sulfane into molecular formula.
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C14H18N4OS
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