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. 2020 May 20;21(10):3621. doi: 10.3390/ijms21103621

Figure 3.

Figure 3

Representation of highest occupied molecular orbital-lowest unoccupied molecular orbital (HOMO-LUMO) gap (A) and Burgi–Dunitz angle between hydroxyl group of serine and ester carbonyl of the optimal prodrug (epalrestat-guaiacol) (B). Reproduced with permission from [31].