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. 2020 Nov 12;71(4):213–218. doi: 10.1055/a-1275-0228

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Fig. 3 — Intermolecular Complex formed by Curcumin and Piperine: The intermolecular distance between carbonyl group of Piperine to Enol group, two phenolic hydroxyl groups of Curcumin is 7.587Å, 9.688Å and 10.374Å, respectively.