Mass Spectrometry of Bis-Quinolizidine Alkaloids: FAB-MS of Oxo-Substituted Sparteines

<table>Structures of sparteine lactams (<b>1</b>–<b>3</b>), oxo-substituted derivatives of lupanine (<b>4</b>, <b>5</b>) and hydroxy-substituted derivatives of lupanine (<b>6</b>, <b>7</b>).</table>

International Journal of Analytical Chemistry

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Figure 1

Figure 1: Mass Spectrometry of Bis-Quinolizidine Alkaloids: FAB-MS of Oxo-Substituted Sparteines 