Biology Reference
In-Depth Information
casuarictin are found in plants of other families,
e.g.
,
Betulaceae
,
Coriariaceae
,
Cornaceae
,
Fagaceae
,
Hamamelidaceae
,
Lecythidiaceae
,
Lythraceae
,
Melastomataceae
,
Myrtaceae
,
Nyssaceae
,
Onagraceae
,
Rosaceae
,
Theaceae
and
Trapaceae
.
HO
HO
OH
OH
HO
HO
HO
HO
HO
HO
OH
OH
O
O
O
O
OH
OH
O
O
O
O
O
O
OH
OH
O
O
O
O
Ascorbic acid
OH
OH
O
O
O
O
O
H
O
O
H
O
O
O
HO
O
H
O
H
O
H
O
O
H
O
O
O
OH
HO
OH
OH
HO
HO
O
O
O
OH
OH
OH
HO
HO
H
Geraniin
Ascorgeraniin (Elaeocarpusin)
HO
OH
HO
HO
HO
HO
OH
OH
HO
HO
HO
O
O
OH
OH
O
O
O
O
O
OH
OH
O
O
O
O
O
OH
OH
O
O
O
O
O
O
OH
H
H
O
O
O
O
HO
HO
O
O
O
O
OH
OH
OH
HO
N
OH
HO
OH
O
OH
OH
O
OH
HO
OH
Geraniin
N
A phenazine derivative
Fig. 1.2 Examples of condensation reactions of the geraniin DHHDP group yielding
ascorgeraniin and a phenazine derivative.
1.3.3
C
-glycosidic ellagitannins and complex tannins
1.3.3.1
Occurrence of C-glycosidic tannins in plants
The
C
-glycosidic tannins that are exemplified by casuarinin, stachyurin
and casuariin, first isolated from
Casuarina stricta
(Okuda
et al
., 1982c,
