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3380 (OH) 1620 (C=C) 3380 (OH) 1620 (C=C) 3420 (OH) 1620 (C=C) 3400 (OH) 1620 (C=C) 3400 (OH) 1620 (C=C)

from P. ginseng root extracts designating the compounds ginsenosides Ro, Ra, Rbi, Rb2, Rc, Rd, Re, Rf, Rg^ Rg2, Rg3, Rh and Rh2. They noted that the protopanaxadiol-derived Rb group (Rb1 and Rb2) and the protopanaxatriol-derived Rg group (Rg1, Rg2 and Rg3) saponins were quantitatively the main glycosides present. In the same year Andreev and his Russian co-workers (1974) isolated 14 panaxosides from TLC plates and subsequent cooperative work has correlated the two groups of saponins. The studies of the American chemist E.J.Staba and his colleagues on the indigenous P. quinquefolium revealed that the saponins identified as panaquilins by earlier workers were also identical with the ginsenosides (Table 5.2) (Hou, 1978).

In the past two decades the markedly improved methods of chemical analysis, including thin layer chromatography (TLC), which permitted the early rapid identification of ginseng roots and ginseng preparations, and gas-liquid (or vapour phase) chromatography (GLC), have been largely replaced by high performance liquid chromatography (HPLC), a technique equally applicable

Table 5.2. Correlation of the nomenclature of ginsenosides, panaxosides and panaquilins





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