2.8.2 Pentacyclic Triterpenoid Saponins
This particular class of
saponin essentially contains the sapogenin component with pentacyclic triterpenoid
nueleus, that is eventually linked with either sugars or uronic acids. It
is pertinent to mention here that the sapogenin may be further
classified into three major categories namely: α-Amyrin, β-Amyrin
and Lupeol.
Interestingly, the most
important derivative of this specific class of saponins is the triterpenoid acids
that are present in different drugs. The general structure of the
tritenpenoid acid is given below and a few commonly found such acids are
summarized herewith:
The typical examples of some
naturally occurring plants containing the pentacyclic triterpenoid saponins shall
be described in the sections that follow.
Triterpenoid Acids in Plants
Source: Pharmacognosy And Pharmacobiotechnology By Ashutosh Kar
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