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Journal Article
Research Support, Non-U.S. Gov't
Melanogenesis inhibitory pregnane glycosides from Cynanchum atratum.
Bioorganic & Medicinal Chemistry Letters 2018 April 16
Bioassay-guided fractionation of the methanolic extract from the roots of Cynanchum atratum has resulted in the isolation of three new pregnane glycosides (1-3) along with four known compounds (4-7). Their structures were identified by analysis of the spectroscopic data including extensive 2D NMR. All of the isolates were evaluated for their potential to inhibit the melanin production in α-melanocyte stimulating hormone (α-MSH)-activated B16 melanoma cells. Of these, compounds 4-7 dose-dependently inhibited the melanin production with the IC50 values ranging from 4 μM to 33 μM.
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