The constituents of Eriostemon trachyphyllus. The structure of trachyphyllin, a new coumarin

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Abstract
Traohyphyllin, a new coumarin occurring in Eriostemon trachyphyllus, has been shown to have structure (I) mainly on spectroscopic evidence. Also present in the tree are α-pinene, ethyl valerate, eugenol, methyleugenol, the coumarins bergapten and xanthoxyletin, and the alkaloid edulinine. The nitration and bromination reactions of xanthoxyletin are discussed.

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