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  • Title: Synthesis and inotropic activity of pyrazolo[4,3-c]pyridine-4-ones and related compounds.
    Author: Ogawa K, Miyoshi K.
    Journal: J Pharm Sci; 1992 Jun; 81(6):581-5. PubMed ID: 1522499.
    Abstract:
    Two series of 3,6-dimethyl-1-phenyl-1H-pyrazolo[4,3-c] pyridine-4-ones (5-9) and 3,6-dimethyl-1-phenyl-1H-pyrazolo[4,3-c] pyridine-4-thiones (11-13) were prepared from dehydroacetic acid as starting material and evaluated for positive inotropic activity in vitro. Moreover, the activity of the synthesized compounds was compared with that of mirlinone as a reference. Among these compounds, the positive inotropic activity of 8a, 11a, and 12 were approximately 1.24, 1.77, and 1.11 times more potent, respectively, than that of mirlinone.
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