4A7I:
reference: Fragment deconstruction of small, potent factor xa inhibitors: exploring the superadditivity energetics of fragment linking in protein-ligand complexes., Nazare M, Matter H, Will DW, Wagner M, Urmann M, Czech J, Schreuder H, Bauer A, Ritter K, Wehner V, Angew Chem Int Ed Engl. 2012 Jan 23;51(4):905-11. doi:, 10.1002/anie.201107091. Epub 2011 Dec 21. PMID: 22190348

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