Hedera acid

Hedera rhombea (Miq.) Bean H. helix L. Chang Chun Ton (leaf) Hederin, hederaic acid, tannic acid, oleic acid.50 For cough, headache, diaphoretic, emmenagogue. 

Although the most common unsaturated fatty acids in plants are derived from oleic acid, a wide range of unusual fatty acids are found in the seed oils of different species. Divergent plastid acyl-ACP desaturases have been shown to account for some of this diversity. For example, Coriandrum sativum achieves seed oils rich in A -18 1 (pet-roselinic acid) by desaturation of 16 0 at the A position followed by elongation, while Thunbergia alata attains a similar oil by direct A -desaturation of 16 0. A single acyl-ACP desaturase from Hedera helix can even produce A -dienes (E. Whittle, 2005). 

BilgerW andBjorkmanO (1990) Role of the xanthophyll cycle in photoprotection elucidated by measurements oflight-induced absorbance changes, fluorescence and photosynthesis in leaves of Hedera canariensis. Photosynth Res 25 173-185 Bratt CE, Arvidsson P-O, Carlsson M and Akerlund H-E (1995) Regulation ofviolaxanthin de-epoxidase by pH and ascorbate concentration. Photosynth Res 45 169-175 Buettner GR and Jurkiewicz BA (1996) Chemistry and biochemistry of ascorbic acid. In Cadenas E, Packer L (eds) Handbook of Antioxidants, pp 91-115. Marcel Dekker Inc., New York... 

Hederae terrestris herba (ground ivy) (2) shows different and less concentrated triterpenoid zones in the R, range 0,15-0,2 and two additional weak grey-blue zones in the R, range 0.25-0.35 (ursolic and oleanolic acid derivatives). 

The Hedera helix samples (1,3,5) are characterized by a series of prominent blue fluorescent zones of phenol carboxylic adds and coumarins in the R, range 0.45-0.95 e.g. chlorogenic acid (T2) and scopoletin-7-O-glucoside at R, 0.45-0.5, the... 

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