5NDE:
reference: Cyclobutanone Mimics of Intermediates in Metallo-beta-Lactamase Catalysis., Abboud MI, Kosmopoulou M, Krismanich A, Johnson JW, Hinchliffe P, Brem J, Claridge TDW, Spencer J, Schofield C, Dmitrienko GI, Chemistry. 2017 Dec 17. doi: 10.1002/chem.201705886. PMID: 29250863

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