Pyridazine, also known as o-diazobenzene, is a six-membered heterocyclic compound containing two nitrogen heteroatoms in the 1 and 2 positions with a special structure and a wide biological activity. Pyridazine is more and more popular in drug development, and a variety of pyridazine drugs have been developed and marketed. From the perspective of the therapeutic field, pyridazine drug molecules are mainly used for tumor treatment, but also involve in many therapeutic fields such as inflammation, hypertension and cardiovascular disease. With the increase and in-depth of research, pyridazine drugs will play more roles in the treatment of diseases.
Pyrazoles are organic compounds of the general formula C3H3N2H. It is a five-membered heterocycle consisting of three carbon atoms and two adjacent nitrogen atoms. As an H-bond-donating heterocycle, pyrazole has been used as a more lipophilic and metabolically more stable bioisomer of phenol. Pyrazoles have attracted more and more attention due to their broad spectrum of action and strong efficacy.
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The imidazothiazole, consisting of an imidazole ring fused with a thiazole ring, has been reported to have excellent immunostimulating and anti-inflammatory activities. Fused heterocyclic compounds are of great importance and are found in various types of synthetic and naturally occurring biologically important compounds. Imidazothiazoles and imidazopyridines possess a variety of applications such as dyes, pesticides, fungicides, antitumor, antiinflammatory, and analgesic activity.
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