Slight changes in the chemical structure of haemanthamine greatly influence the effect of the derivatives on rumen fermentation in vitro

Eva Ramos-Morales, Jamie Tibble-Howlings, Laura Lyons, Magnus O Ogbu, Patrick J Murphy, Radek Braganca, CJ Newbold

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Although the potential of plants extracts to improve feed efficiency and animal productivity and decrease methane emissions by enteric fermentation has been shown, the information available is often contradictory which has been attributed to differences in the complex mixture of bioactive compounds and their interactions. Understanding the degree to which structural features in a compound may affect the biological activity of an extract is essential. We hypothesised that relative small variations in the structure of a compound can have a significant influence on the ability of the derivatives to alter fermentation in the rumen. Nine compounds were synthetized from the natural alkaloid haemanthamine and tested in vitro for their effects on rumen protozoa and fermentation parameters. Our results showed that simple esterifications of haemanthamine or its derivative dihydrohaemanthamine with acetate, butyrate, pivalate or hexanoate led to compounds that differed in their effects on rumen fermentation.

Original languageEnglish
Article number2440
Number of pages7
JournalScientific Reports
Issue number1
Early online date21 Feb 2019
Publication statusPrint publication - 2019



  • Biological models
  • Chemical modification

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