Piceatannol

**Semantic type:** Organic Chemical|Pharmacologic Substance

**Definition:** A polyhydroxylated stilbene extract from the seeds of Euphorbia lagascae, which inhibits protein tyrosine kinase Syk and induces apoptosis. (NCI)

**Synonyms:** - 3,4,3',5'-Tetrahydroxy-trans-stilbene - PICEATANNOL