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. 2020 Feb 25;15(2):e0229149. doi: 10.1371/journal.pone.0229149

Fig 2.

Fig 2

Chemical structure of the SAL-3 molecule (A–non-ionized form, B–form with an H-bond between the–OH and C = O group, C–form after proton transfer between the–OH and C = O group, in this case a carbonyl group is formed and an–OH group emerges where the carbonyl group used to be).