Figure 1 from: Chaban T, Ogurtsov V, Mahlovanyy A, Sukhodolska N, Chaban I, Harkov S, Matiychuk V (2019) Antioxidant properties of some novel derivatives thiazolo[4,5-b] pyridine. Pharmacia 66(4): 171-180. https://doi.org/10.3897/pharmacia.66.e36764

Figure 1 Synthesis of N'-[2-(5,7-dimethyl-2-oxo-thiazolo[4,5-b]pyridine-3-yl)-acetyl] carboxylic acids hydrazides under the acylation reaction.