Department of Chemistry, University of the West Indies, Mona Campus, Kingston, Jamaica Department of Horticultural Sciences, Michigan State University, East Lansing, MI 48824, U.S.A. Department of Chemistry, University of Toronto, Toronto M5S 3H6, Canada Manuscript received 28 September 1999 An endemic Jamaican variety of Piper αmαlαgo has afforded six amides. Four are known compounds, and two (1 and 2) are new. Two-dimensional NMR spectroscopy has been used to assign the structures of the new am ides and to assign completely the 1H and 13C NMR spectra of the known compounds. All six am ides have been tested for insecticidal activity against Aedes αegyptii larvae; some activity is observed and related to molecular features. But none of the compounds show activity against Mycobαcterium tuberculosis.
