6H8J:
reference: Insights into Urease Inhibition by N-( n-Butyl) Phosphoric Triamide through an Integrated Structural and Kinetic Approach., Mazzei L, Cianci M, Contaldo U, Ciurli S, J Agric Food Chem. 2019 Feb 27;67(8):2127-2138. doi: 10.1021/acs.jafc.8b04791., Epub 2019 Feb 18. PMID: 30735374

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