Document Report Card

ID: ALA3108754

Journal: J Nat Prod

Title: Herbicidin congeners, undecose nucleosides from an organic extract of Streptomyces sp. L-9-10.

Authors: Chai X, Youn UJ, Sun D, Dai J, Williams P, Kondratyuk TP, Borris RP, Davies J, Villanueva IG, Pezzuto JM, Chang LC.

Abstract: Four new undecose nucleosides (herbicidin congeners), three known herbicidins, and 9-(β-d-arabinofuranosyl)hypoxanthine (Ara-H) were isolated from the organic extract of a fermentation culture of Streptomyces sp. L-9-10 using proton NMR-guided fractionation. Their structures were elucidated on the basis of comprehensive 1D and 2D NMR and mass spectrometry analyses. These structures included 2'-O-demethylherbicidin F (1), 9'-deoxy-8',8'-dihydroxyherbicidin B (2), 9'-deoxy-8'-oxoherbicidin B (2a), and the 8'-epimer of herbicidin B (3). This is the first detailed assignment of proton and carbon chemical shifts for herbicidins A, B, and F. The isolated compounds were evaluated for cancer chemopreventive potential based on inhibition of tumor necrosis factor alpha (TNF-α)-induced nuclear factor-kappa B (NF-κB) activity.

CiteXplore: 24533857

DOI: 10.1021/np4006635