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  • Title: [Synthesis and positive inotropic action of some 5-substituted 5H-(1)benzopyrano(4,3-b)pyridines].
    Author: Heber D, Ravens U.
    Journal: Arzneimittelforschung; 1985; 35(11):1624-6. PubMed ID: 4091865.
    Abstract:
    The 5-hydroxy-5H-[1]benzopyrano [4,3-b]pyridines (4) were converted to the acetales 7-10 on treatment with alcoholic solutions in the presence of concentrated hydrochloric acid. Reactions of with aliphatic and aromatic amines yielded the aminoacetales 11-15. The effects of compounds 7-15 were examined on the isolated perfused guinea-pig heart.
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