trans-Caffeic acid

Abies sp., Acer sp., Achyrocline sp., Aesculus sp., Ailanthus sp., Akebia sp., Anagallis sp., Anchusa sp., Angelica sp., Antennaria sp., Apium sp., Aquilegia sp., Arctium sp., Argyreia sp., Betula sp., Bupleurum sp., Calendula sp., Camellia sp., Chamaemelum sp., Chamomilla sp., Cichorium sp., Cicuta sp., Cimicifuga sp., Cinnamomum sp., Cirsium sp., Citrus sp., Consolida sp., Cornus sp., Crataegus sp., Cyamopsis sp., Cynara sp., Datura sp., Drimys sp., Eleutherococcus sp., Erythroxylum sp., Euphorbia sp., Euphrasia sp., Fallopia sp., Foeniculum sp., Galium sp., Geranium sp., Gossypium sp., Gypsophila sp., Haematoxylum sp., Hamamelis sp., Hedera sp., Humulus sp., Hydrophyllum sp., Hypoxis sp., Ilex sp., Illicium sp., Inula sp., Iris sp., Jacaranda sp., Kadsura sp., Knautia sp., Lavandula sp., Linum sp., Lithospermum sp., Lycopodium sp., Lycopus sp., Malus sp., Maytenus sp., Melissa sp., Mentha sp., Nepeta sp., Olea sp., Oenothera sp., Ononis sp., Orchis sp., Perilla sp., Persicaria sp., Pimpinella sp., Piper sp., Plantago sp., Platanus sp., Polygonum sp., Potentilla sp., Primula sp., Rhododendron sp., Rosmarinus sp., Salvia sp., Sambucus sp., Sanguisorba sp., Scrophularia sp., Sesamum sp., Solanum sp., Solidago sp., Sorbus sp., Strychnos sp., Syzygium sp., Tanacetum sp., Teucrium sp., Thymus sp., Tilia sp., Trigonella sp., Urtica sp., Valeriana sp., Verbascum sp., Veronica sp., Viburnum sp., Vincetoxicum sp., Viscum sp.