[structure: see text] Three novel phloroglucinol derivatives of lysidicins A-C (1-3) have been isolated from the roots of Lysidice rhodostegia and structures were elucidated by comprehensive NMR and MS spectroscopic analysis. 1 and 2 possess spirocyclic benzodihydrofuran skeleton. Their relative stereochemistries were assigned by NOE or NOESY experiment. A plausible pathway for the biosynthesis of 1-3 from 4 and a ketose derivative was postulated.
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Hu et al. (2006) studied this question.
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