Squamocin-O 1 and squamocin-O 2 , new adjacent bis-tetrahydrofuran acetogenins from the seeds of Annona squamosa
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説明
Two bis-tetrahydrofuran acetogenins, squamocin-O(1) (1) and squamocin-O(2) (2), were isolated from a MeOH extract of seeds of Annona squamosa L. Their structures were determined by spectral means including precursor-ion scanning mass spectral analysis for their aminal derivatives. The configurations at the oxymethine chiral centers were assigned as 12R,15R,16R,19R,20R,23R,24S,28S,36S for 1 and 12S,15R,16R,19R,20R,23R,24S, 28S,36S for 2, based on 1H NMR analysis of their Mosher's ester derivatives and CD data.
収録刊行物
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- Phytochemistry
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Phytochemistry 61 999-1004, 2002-12-01
Elsevier BV