Flavone 8-C-Glycosides from Haberlea rhodopensis FRIV. (Gesneriaceae)

[摘要]：Phytochemical profiling of a MeOH extract from Haberlea rhodopensis by a combination of liquid/liquid extraction, and preparative and semi-preparative HPLC afforded three new flavone C-glycosides, hispidulin-8-C-(2''-O-syringoyl)-beta-glucopyranoside (3), hispidulin 8-C-(6-O-acetyl-beta-glucopyranoside) (4), and hispidulin 8-C-(6-O-acetyl-2-O-syringoyl-beta-glucopyranoside) (5), along with two known phenolic glycosides, myconoside (1) and paucifloside (2). The structures were established by extensive spectroscopic analyses including 1D- and 2D-NMR (COSY, HSQC, and HMBC), and HR-ESI-TOF-MS, and by comparison with published data.

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