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What is the molecular formula of the molecule identified by 2-[4-[[(4aR,7aS)-1-(3-methylbut-2-enyl)-6,6-dioxo-2,3,4a,5,7,7a-hexahydrothieno[3,4-b]pyrazin-4-yl]methyl]-3-methylpyrazol-1-yl]ethanol ?
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C18H30N4O3S
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