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  • Title: Studies in the field of pyridazine compounds. Part 21. Structural studies on 6-H-pyrimido[1,2-b]-1,2,4-triazolopyridazines.
    Author: Kosary J, Polos K, Kasztreiner E.
    Journal: Pharmazie; 1987 May; 42(5):304-5. PubMed ID: 3671438.
    Abstract:
    The structure of 7,8-dihydro-6H-pyrimido [1,2-b]-1,2,4-triazolo [3,4-f] pyridazine (2a) was confirmed by 1H and 13C NMR spectroscopy and by preparation of the isomeric [5,1-f] pyridazine 3. Some derivatives of 6H-pyrimido [1,2-b]-1,2,4,-triazolo [3,4-f]pyridazine were prepared. Compounds 2a, 2b and 9a showed a positive inotropic effect.
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