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What is the molecular formula of the molecule (8S)-8-(3-bromo-5-ethoxy-4-hydroxyphenyl)-3-(3-chlorophenyl)-6-oxo-2,4,7,8-tetrahydropyrido[2,1-b][1,3,5]thiadiazine-9-carbonitrile ?
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C22H19BrClN3O3S
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