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. 2020 Jul 14;14(1):43. doi: 10.1186/s13065-020-00695-1

Fig. 2.

Fig. 2

Illustrates the binding mode of 5-amino-nicotinic acid derivatives active compounds in α-amylase binding site. a Compound 4, b compound 2, c Compound 7 and d compound 6. Key interaction types are represented in color code in each case (green: hydrogen bond, purple: alkyl contact, brown: pi stacking)