Mollanol A, a Diterpenoid with a New C‑Nor-D-homograyanane Skeleton from the Fruits of Rhododendron molle
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Two new grayanoids, mollanol A (1) and rhodomollein XXV (2), were isolated from the fruits of Rhododendron molle. Their structures were elucidated by spectroscopic methods and X-ray diffraction analyses. Mollanol A (1) possesses a new C-nor-D-homograyanane carbon skeleton, while rhodomollein XXV (2) is the first example of an 11,16-epoxygrayanane and features a caged oxa-tricyclo[3.3.1.03.7]nonane ring system. Plausible biogenetic pathways for 1 were proposed. Compound 1 exhibited transcriptional activation effects on the xbp1 upstream promoter in IEC-6, 293T, and RAW264.7 cells.
创建时间：
2016-02-17
