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What is the molecular formula of the compound with this IUPAC name (2S,5R,6R)-6-[[3-carboxy-3-(4-ethoxyphenyl)propanoyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid ?
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C20H24N2O7S
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