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Coumarins from aster praealtus



Coumarins from aster praealtus



Phytochemistry 28(6): 1729-1736



Chemical analysis of aerial parts and roots of Aster praealtus provided, besides the known coumarins umbelliferone, marmin, epoxyaurapten and 6'-hydroxy-.beta.-cycloaurapten, four new 7-0-monoterpene ether derivatives of umbelliferone, praealtin A-D. The structures of the new compounds were established by NMR, IR, UV and mass spectral analyses and the molecular structure of praeltin A was determined by single crystal X-ray diffraction. No coumarins were detected in the following taxa: A. adnatus, A. concolor, A. dumosus .times. lateriflorus and A. lateriflorus, A. patens, A. spinosus, A. subulatus var. liqulatus, and A. tenuifolius. Aster adnatus provided the .DELTA.7-sterol, spinasterol, and A. spinosus gave the known acetylene lachnophyllum lactone.

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Accession: 007165863

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DOI: 10.1016/s0031-9422(00)97834-8


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