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What is the molecular formula of the molecule identified by [(3aR,8aR)-2-[(3-chlorophenyl)methyl]-1,1-dioxo-3a,4,5,7,8,8a-hexahydro-3H-[1,2]thiazolo[4,5-d]azepin-6-yl]-pyrazin-2-ylmethanone ?
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C19H21ClN4O3S
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