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7-[(4As,7aS)-1-[(5-methyl-2-oxo-1,3-dioxolan-4-yl)methyl]-3,4,4a,5,7,7a-hexahydro-2H-pyrrolo[3,4-b]pyridin-6-yl]-8-cyano-1-cyclopropyl-6-fluoro-4-oxoquinoline-3-carboxylic acid


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