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  • Title: Protein tyrosine phosphatase 1B inhibitors from Morus root bark.
    Author: Cui L, Na M, Oh H, Bae EY, Jeong DG, Ryu SE, Kim S, Kim BY, Oh WK, Ahn JS.
    Journal: Bioorg Med Chem Lett; 2006 Mar 01; 16(5):1426-9. PubMed ID: 16356713.
    Abstract:
    An organic layer prepared from the Chinese crude drug 'Sang-Bai-Pi' (Morus root bark) was studied in order to identify the inhibitory compounds for protein tyrosine phosphatase 1B (PTP1B). Bioassay-guided fractionation resulted in the isolation of sanggenon C (1), sanggenon G (2), mulberrofuran C (3) and kuwanon L (4) as PTP1B inhibitors, along with moracin O (5) and moracin P (6). Compounds 1-4 inhibited PTP1B with IC(50) values ranging from 1.6+/-0.3 microM to 16.9+/-1.1 microM.
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