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  • Title: Pyridindolols K1 and K2, new alkaloids from Streptomyces sp. K93-0711.
    Author: Kim YP, Takamatsu S, Hayashi M, Komiyama K, Omura S.
    Journal: J Antibiot (Tokyo); 1997 Mar; 50(3):189-93. PubMed ID: 9127188.
    Abstract:
    Two new alkaloids with the beta-carboline skeleton, pyridindolols K1 (C18H18N2O5) and K2 (C16H16N2O4), were isolated from the culture both of Streptomyces sp. K93-0711. The structure of pyridindolols were established by spectroscopic investigations and chemical transformations. Pyridindolol K2 inhibited the adhesion of HL-60 cells to LPS-activated HUVEC monolayer (IC50 = 75 micrograms/ml).
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