Stilbenoids are secondary products of heartwood formation in trees that can act as phytoalexins. Chemically they are hydroxylated derivatives of stilbene. Biochemically they belong to the family of phenylpropanoids and share most of their biosynthesis pathway with chalcones. 
They have been suggested by some studies to be responsible for resistance to some tree diseases, such as pine wilt.
1. Hillis WE (1987) Heartwood and tree exudates. Springer, Berlin Heidelberg New York. 2. Yamada T, Ito S (1993) Chemical defense responses of wilt-resistant pine species, Pinus strobus and P. taeda, against Bursaphelenchus xylophilus infection. Ann Phytopathol Soc Jpn 59:666–672.
- V. S. Sobolev, B. W. Horn, T. L. Potter, S. T. Deyrup, J. B. Gloer (2006). "Production of Stilbenoids and Phenolic Acids by the Peanut Plant at Early Stages of Growth". J. Agric. Food Chem. 54 (10): 3505–3511. doi:10.1021/jf0602673 S0021-8561(06)00267-6 Check
- Jang MS, Cai EN, Udeani GO (1997). "Cancer chemopreventive activity of resveratrol, a natural product derived from grapes". Science. 275 (5297): 218–220.
|biochemicalsMajor families of|
|Peptides | Amino acids | Nucleic acids | Carbohydrates | Nucleotide sugars | Lipids | Terpenes | Carotenoids | Tetrapyrroles | Enzyme cofactors | Steroids | Flavonoids | Alkaloids | Polyketides | Glycosides|
|Analogues of nucleic acids:||Types of Flavonoids||Analogues of nucleic acids:|
|Flavones:||Luteolin | Apigenin | Tangeritin Synthetics: Diosmin | Flavoxate|
|Isoflavones:||Genistein | Daidzein | Biochanin A | Formononetin | Coumestrol | Daidzin | Puerarin|
|Flavonols:||Myricetin | Quercetin | Kaempferol | Fisetin | Isorhamnetin | Pachypodol | Rhamnazin|
|Flavanones:||Hesperetin | Naringenin | Eriodictyol | Homoeriodictyol|
|3-Hydroxyflavanones:||Dihydroquercetin | Dihydrokaempferol|
|Flavan-3-ols:||Catechins | Epicatechins | Epigallocatechin|
|Anthocyanidins:||Cyanidin | Malvidin | Delphinidin | Pelargonidin | Peonidin | Petunidin|
|Misc:||List of phytochemicals and foods in which they are prominent|