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(5-Methyl-2-oxo-1,3-dioxolan-4-yl)methyl (5R,6S)-6-[(1R)-1-hydroxyethyl]-7-oxo-3-(oxolan-3-ylmethyl)-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate


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