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Six new monoterpene alkaloids, kinabalurines A−F ( 1 − 6 ), were obtained from an EtOH extract of the leaves of Kopsia pauciflora. The structures of the alkaloids were established by spectral analysis and chemical correlations and, in the case of kinabalurines A ( 1 ) and D ( 4 ), by X-ray crystallographic analysis.
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Kam et al. (1997) studied this question.
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