Original Article | Published:

Anthelmintic Macrolactams from Nonomuraea turkmeniaca MA7381

The Journal of Antibiotics volume 61, pages 5962 (2008) | Download Citation

Abstract

A new macrolactam, fluvirucin B0 (1), and two known macrolactams, Sch 38516/fluvirucin B1 (2) and Sch 39185/fluvirucin B3 (3), have been isolated from an acetone extract of a strain of Nonomuraea turkmeniaca. These compounds were isolated by bioassay-guided fractionation as part of our search for new anthelmintics. The structures of these compounds were elucidated by comparison of their NMR and MS data to those of previously reported fluvirucins, and confirmed by 2D-NMR. 1~3 exhibited in vitro activity (EC90 <1.0~1.7 μg/ml) against Haemonchus contortus larvae, but were ineffective in reducing worm counts in vivo against Heligmosomoides polygyrus in mice at 50 mg/kg dosed intramuscularly.

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Author information

Affiliations

  1. Natural Products Chemistry, Merck Research Laboratories, P.O. Box 2000, Rahway, NJ 07065

    • Sloan Ayers
    • , Deborah L Zink
    •  & Sheo B Singh
  2. Merck and Co., Inc., Branchburg Farm, 203 River Road, Somerville, NJ 08876

    • Joanne Staats Powell
    • , Christine M Brown
    •  & Donald Thompson
  3. Bio-Technical Resources, 1035 South 7th St., Manitowoc, WI 54220

    • Alan Grund
  4. Centro de Investigación Básica, Merck, Sharp & Dohme de Espana, S.A., Josefa Valcarcel 38, 28027 Madrid, Spain

    • Olga Genilloud
    •  & Oscar Salazar

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Correspondence to Sheo B Singh.

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DOI

https://doi.org/10.1038/ja.2008.110

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