Info

Rs,

-Glc2-Glc''-acetyl

-Glcfi-Ara(f)

Notoginsenoside R4

-Glc2-Glc

-Glc('-Glc6-Xyl

Quinquenoside

ri

-Glc2-Glc6-acetyl

-Glc6-Glc

spectrometry (GC/MS) several workers have unravelled mixtures of 50 or more components of which up to 25 percent are sesquiterpenes; principal terpene components include a-elemene, p-elemene, y-elemene, a-aromadendrene, p-aromadendrene, alloaromadendrene, cis- and trans-caryophyllene, a-guaiene, p-guaiene, S-guaiene, £-muurolene, p- and y-patchoulene, etc. (Sun et al., 1985; Sun et al., 1987). Less volatile compounds isolated from the low boiling (71110° C.) fraction of the oil included substances such as the sesquiterpene hydrocarbon p-elemene (b.p. 73° C). Other sesquiterpenoid compounds reported include a-panasinsene, p-panasinsene, a-neoclovene and p-neoclovene and the sesquiterpene alcohols panasinsanol A and B (Iwabuchi et al., 1987) and, from the rootlets, ginsenol (Iwabuchi et al., 1988). Ethereal extracts of the rootlets also yielded (+)-spathulenol, (-)-4p, 10a-aromadendranediol, (-)-neointermedeol and senecrassidol (Iwabuchi et al., 1990).

The Korean chemists investigated the occurrence of lipids in P. ginseng roots and Table 5.7 summarises published data.

Table 5.4. Structure of protopanaxatriol type ginsenosides

Table 5.4. Structure of protopanaxatriol type ginsenosides

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