37 research outputs found

    A New Quinolizidine Alkaloid from the Papua New Guinean Sponge <i>Xestospongia exigua</i>

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    A new bis-quinolizidine alkaloid, xestosin A ( 1 ), possessing cis- and trans-quinolizidine nuclei, has been isolated from the Papua New Guinean sponge Xestospongia exigua. The structure was determined by spectrometric and single-crystal X-ray analyses
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