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  • Title: Two diterpenes and three diterpene glucosides from Phlogacanthus curviflorus.
    Author: Yuan XH, Li BG, Zhang XY, Qi HY, Zhou M, Zhang GL.
    Journal: J Nat Prod; 2005 Jan; 68(1):86-9. PubMed ID: 15679324.
    Abstract:
    Two new diterpene lactones, phlogacantholides B (1) and C (2), and three new diterpene lactone glucosides, phlogacanthosides A (3), B (4), and C (5), together with lupeol, beta-sitosterol, betulin, beta-daucosterol, (+)-syringaresinol, and (+)-syringaresinol-4-O-beta-D-glucopyranoside, were isolated from the roots of Phlogacanthus curviflorus. Their structures were elucidated by chemical and spectroscopic evidence. The structure, including the relative configuration of phlogacantholide B (1), was confirmed by X-ray crystallographic analysis of its diacetate (6).
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