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What is the molecular formula of the compound with this IUPAC name (5R,6S,7S)-5-(4-methoxyphenyl)-7-(4-methylphenyl)-2-oxo-3,5,6,7-tetrahydrothiopyrano[2,3-d][1,3]thiazole-6-carboxylic acid ?
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C21H19NO4S2
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