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What is the molecular formula of the molecule identified by (4R,5S,6R)-3-[(3S,5R)-5-[(2Z)-2-(cyclopropanecarbonylamino)-2-hydroxyiminoethyl]pyrrolidin-3-yl]sulfanyl-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid ?
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C20H28N4O6S
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