Labiatae flavonoids

Zaidi, F., Voirin, B., Jay, M. and Viricel, M. R. 1998. Free flavonoid aglycones from leaves of Mentha pulegium and Mentha suavolens (Labiatae) Phytochemistry 48 991-994. 

Tomas-Barberan, F.A. and Wollenweber, E., Flavonoid aglycones from the leaf surfaces of some Labiatae species. Plant. Syst. Evol, 173, 109, 1990. 

Tomas-Barberan, F.A. et al., Flavonoid p-coumaroylglucosides and 8-hydroxyflavone allosylglu-cosides in some Labiatae, Phytochemistry, 31, 3097, 1992. 

This section summarises recent work on alkaloids containing the pyrrolidine nucleus. A short review concerning the synthesis of this group has appeared. A variety of Labiatae plants have been screened and some of them have been shown to contain pyrrolidine alkaloids. Cuskhygrine has been found in the roots of three Datura species and stachydrine has been obtained from Capparis spinosa3 The structure of trichostachine (1) Piper trichostachyon) has been elucidated by spectral means and confirmed by synthesis. Ficine (5), an interesting flavonoid alkaloid, has been synthesised. Friedel-Crafts reaction between... 

Labiatae Basil, marjoram, mint, thyme, rosemary, dill, oregano, sage Mono-, diterpenes, flavonoids, rosmarol, ursolic acid, phenolic derivatives... 

Extracts derived from most members of the Labiatae family (Table 3) have the potential to reduce the oxidation of food products and extend shelf life. This antioxidant action is dependent on the ability of the constituent phenolics to scavenge free radicals and chelate metals [27]. This dual effect has implications for CHD since it has been proposed in some studies, mainly from Europe, that a high status of iron increases the risk of CHD [28]. A number of the active compounds found in rosemary have also been found in sage and other herbs. In oregano, four flavonoids were identified among the active fraction [29], while in thyme, dimers of thymol and flavonoids have been isolated and characterized. 

Key Word Index — Labiatae Scutellaria amoem flavonoids. ... 

Hiermann (1995) used different flavonoid patterns to distinguish Epilobium angustifolium from 11 other species of Epilobium by TLC on silica gel and polyamide and HPLC coupled with photodiode array detection. Rustan et al. (1995) developed TLC methods to determine flavonoids extracted from Mediterranean plants of the Labiatae group. Van Ginkel (1996) used TLC to identify alkaloids and flavonoids from the bark of Uncaria tomentosa. 

Rustan, I., Michel, N., Sergent, M., Lesgards, G., and Luu, R. P. T. (1995). Adjustment of flavonoid analysis by thin-layer chromatography (TLC) using experimental research methodology study of Labiatae plants. Analwsis 23 398-402. 

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