Table 1.
Plant sources and composition of purified condensed tannin (CT) fractions in terms of content (g CT/100 g fraction), mean degree of polymerization (mDP), percentages of procyanidins (PC), prodelphinidins (PD), cis- and trans-flavan-3-ols and molar percentages of monomeric subunits of CT [PC subunits: catechin (C) and epicatechin (EC); and PD subunits: gallocatechin (GC), epigallocatechin (EGC)]
| Plant source | Botanical name | CT | mDP | PC | PD | cis | trans | GC | EGC | C | EC |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Tilia flowers | Tilia spp. | 91·7 | 7·9 | 99·1 | 0·9 | 95·6 | 4·4 | 0·0 | 0·9 | 4·4 | 94·7 |
| Goat willow leaves | Salix caprea | 83·8 | 5·3 | 95·2 | 4·8 | 4·3 | 95·8 | 3·0 | 2·0 | 92·7 | 2·3 |
| Willow bark | Salix spp. | 83·3 | 9·9 | 94·0 | 6·0 | 78·1 | 21·9 | 0·9 | 5·1 | 21·0 | 73·0 |
| Pine bark | Pinus spp. | 80·0 | 6·6 | 88·8 | 11·2 | 78·1 | 21·9 | 4·9 | 6·9 | 17·1 | 71·1 |
| Hazelnut skin | Corylus avellana | 67·5 | 9·1 | 79·1 | 20·9 | 47·8 | 52·2 | 12·2 | 9·6 | 40·1 | 38·1 |
| Goat willow twigs | Salix caprea | 93·2 | 5·3 | 78·7 | 21·3 | 62·8 | 37·2 | 9·5 | 12·7 | 27·8 | 50·0 |
| Walnut leaves | Juglans regia | 69·0 | 12·3 | 69·1 | 30·9 | 76·3 | 23·7 | 7·0 | 23·9 | 16·7 | 52·4 |
| Weeping willow catkins | Salix babylonica | 97·4 | 8·0 | 67·1 | 33·0 | 57·7 | 42·3 | 17·4 | 16·7 | 25·0 | 40·8 |
| Birch leaves | Betula spp. | 63·6 | 8·3 | 41·1 | 58·9 | 70·7 | 29·3 | 15·3 | 43·6 | 14·0 | 27·1 |
| Sainfoin | Onobrychis viciifolia | 100·0 | 8·7 | 35·2 | 64·9 | 79·2 | 20·9 | 14·8 | 51·3 | 6·1 | 27·8 |
| Blackcurrant leaves A | Ribes nigrum | 100·0 | 6·5 | 5·6 | 94·5 | 7·0 | 93·0 | 88·8 | 5·9 | 4·2 | 1·0 |
| Blackcurrant leaves B | Ribes nigrum | 77·1 | 11·8 | 4·7 | 95·3 | 18·8 | 81·2 | 77·9 | 17·4 | 3·3 | 1·4 |
| White clover flowers A | Trifolium repens | 100·0 | 8·6 | 1·3 | 98·7 | 58·9 | 41·1 | 40·5 | 58·3 | 0·7 | 0·5 |
| White clover flowers B | Trifolium repens | 82·4 | 12·7 | 1·2 | 98·8 | 61·8 | 38·2 | 37·8 | 61·0 | 0·3 | 0·8 |