摘要:
                                Two novel hydroxylamine-containing acylpolyamines, Agel 489a and Agel 505a, each bearing a terminal quaternary ammonium salt, were isolated from the venom of Agelenopsis aperta, a funnel-web spider found throughout the western United States.  Published structures for these compounds were not consistent with our spectral data.  On the basis of fast-atom bombardment (FAB) mass spectrometry and H-1 and C-13 NMR spectra, novel structures for Agel 489a and 505a are proposed.  These structural assignments are confirmed by the total synthesis of Agel 489a.