Kalkipyrone, a toxic gamma-pyrone from an assemblage of the marine cyanobacteria Lyngbya majuscula and Tolypothrix sp

J Nat Prod. 1998 May;61(5):677-80. doi: 10.1021/np970539j.

Abstract

Kalkipyrone, a novel alpha-methoxy-beta,beta'-dimethyl-gamma-pyrone possessing an alkyl side chain, was isolated from an assemblage of the marine cyanobacteria Lyngbyamajuscula and Tolypothrix sp. Its structure, including stereochemistry, was determined by NMR, UV, and IR analysis and by GC-MS of the natural product and key derivatives. Kalkipyrone is toxic to brine shrimp (LD50 1 microg/mL) and gold fish (LD50 2 microg/mL) and is structurally related to the actinopyrones that were previously isolated from Streptomyces spp.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Animals
  • Cyanobacteria / chemistry*
  • Decapoda / drug effects
  • Goldfish
  • Pyrones / chemistry
  • Pyrones / isolation & purification*
  • Pyrones / toxicity
  • Spectrum Analysis
  • Stereoisomerism

Substances

  • Pyrones
  • kalkipyrone