title: Actinidic acid, a new triterpene phytoalexin from unripe kiwi fruit.
abstract: Seven phytoalexins (1-7), including a new compound, were isolated from the peel of unripe kiwi fruit (Actinidia deliciosa cv. Golden King) that had been wounded and inoculated with Colletotrichum musae. The new phytoalexin (1) was identified as 2alpha,3beta,23-trihydroxy-12,20(30)-ursadien-28-oic acid, and named actinidic acid. Phytoalexins 2-6 are known triterpenes but have not previously been described as phytoalexins. Phytoalexin 7 is the same triterpene as the phytoalexin of nectarine fruit.
authors: CREST, Japan Science and Technology Corporation, Kawaguchi.
authors: E H
authors: EH
authors: Lahlou
authors: N
authors: N
authors: Hirai
authors: T
authors: T
authors: Kamo
authors: M
authors: M
authors: Tsuda
authors: H
authors: H
authors: Ohigashi
mesh_terms: D020231:Colletotrichum / Q000472:pathogenicity; D005638:Fruit / Q000737:chemistry* / Q000382:microbiology; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D010935:Plant Diseases / Q000382:microbiology; D010936:Plant Extracts / Q000737:chemistry* / Q000302:isolation & purification*; D012717:Sesquiterpenes; D013729:Terpenes; D014315:Triterpenes / Q000737:chemistry* / Q000302:isolation & purification*; D000094162:Phytoalexins
chemical_list: D010936:Plant Extracts; D012717:Sesquiterpenes; D013729:Terpenes; D014315:Triterpenes; C432928:actinidic acid; D000094162:Phytoalexins