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5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylicacid,7-[[(5R)-5-amino-5-carboxy-1-oxopentyl]amino]-3-[[[3-[4-hydroxy-3-(sulfooxy)phenyl]-2-methoxy-1-oxo-2-propen-1-yl]oxy]methyl]-7-methoxy-8-oxo-,(6R, related products: