Biology Reference
In-Depth Information
Table 2.3 DOG-Type oligomers and their plant sources*
1. Oligomers with 4,6-valoneoyl and 4,6-dehydrovaloneoyl linking units
Compound
Plant source
Family
Heterophylliins A, B, C (
68
)
Corylus heterophylla
Betulaceae
Heterophylliin G
Corylus heterophylla
Betulaceae
Davuriciin D
1
(
69
)
Rosa davurica
Rosaceae
Davuriciin T
1
Rosa davurica
Rosaceae
Coriariins D, E
Coriaria japonica
Coriariaceae
Nobotanins A (
70
), F (
71
)
Tibouchina semidecandra
Melastomataceae
Cornusiins A (
73)
, D, E
Cornus officinalis
Cornaceae
Cornusiin C (
74
)
Cornus officinalis
Cornaceae
Tarapanin A (
75
)
Trapa japonica
Trapaceae
Camptothins A, B
Camptotheca acuminata
Nyssaceae
Calamanins B, C
Terminalia calamansanai
Combretaceae
Isorugosins D (
76
), E
Liquidambar formosana
Hamamelidaceae
Resinins A, B, C (
77
)
Lagerstroemia flos-reginae
Lythraceae
Eugeniflorin D
2
(
86
)
Eugenia uniflora
Myrtaceae
Oenotherin T
1
(
87
)
Oenothera tetraptera
Onagraceae
2. Oligomers with a 2,3-valoneoyl linking unit
Compound
Plant source
Family
Malabathrins B (
72
), C, D
Melastoma malabathricum
Melastomataceae
Nobotanins B (
78
), G, H, I
Heterocentron roseum
Melastomataceae
Resinin D (
79
)
Lagerstoroemia flos-regina
Lythraceae
Camelliatannins D (
80
), H
Camellia japonica
Theaceae
3. Oligomers with a 3,6-valoneoyl linking unit
Compound
Plant source
Family
Euphorbin A (
81
)
Euphorbia hirta
Euphorbiaceae
Euphobin F (
82
)
Euphorbia hirta
Euphorbiaceae
Euphorhellin (
83
)
Euphorbia helioscopia
Euphorbiaceae
Eumaculins A-C
Euphorbia macrata
Euphorbiaceae
Excoecarianin (
84
)
Excoecaria kawakamii
Euphorbiaceae
Bishofianin
Bishofia javanica
Euphorbiaceae
Mallotanins A (
85
), B
Mallotus japonicus
Euphorbiaceae
*Oligomers described in Chapter 1 are here omitted.
The structures of the large complex oligomeric molecules have been
elucidated using spectroscopic techniques, including soft-ionizing mass
spectrometry (ESIMS), 2D NMR techniques (COSY, HSQC, HMBC,
NOESY), and CD spectra, and through partial chemical degradation.
Evidence for the postulate (Haslam 1982, Okuda
et al
., 1980b) that the
