ST 638

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

**Definition:** A tyrosine kinase inhibitor that inhibits phospholipase D activity in human neutrophils at a site between the receptor and phospholipase. (NCI)

**Synonyms:** - 2-Cyano-3-(3-ethoxy-4-hydroxy-5-((phenylthio)methyl)phenyl)-2-propenamide