Abstract Spencermartinsia viticola is one of the most widespread Botryosphaeriaceae species isolated from grapevines in South Australia and New South Wales vineyards in Australia. A new phytotoxic dipyridine-butane-1,4-diol and a new diacrylic acid derivatives, here named spencertoxin (1) and spencer acid (2), were isolated from the culture filtrates of S. viticola isolate DAR78870 together with p-hydroxybenzaldehyde (3) and 2-(4-hydroxyphenyl) acetic acid (4). Spencertoxin and spencer acid were characterized as 2,3-di(pyridin-3-yl)butane-1,4-diol and (2Z,2′Z)-3,3′-(carbonylbis(oxy))diacrylic acid, respectively, by spectroscopic methods (essentially NMR and HRESIMS). Spencertoxin (1), p-hydroxybenzaldehyde (3) and 2-(4-hydroxyphenyl) acetic acid (4) showed phytotoxicity when the pure compounds were assayed on grapevine leaves of Vitis lambrusca and Vitis vinifera cv. Shiraz.

中文翻译：

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Spencermartinsia viticola 生产的二丙烯酸和双吡啶丁-1,4-二醇的新植物毒性衍生物 Spencertoxin 和 spencer acid，是澳大利亚葡萄葡萄枯萎病的病原体

摘要 Spencermartinsia viticola 是从南澳大利亚和澳大利亚新南威尔士葡萄园的葡萄藤中分离出的最广泛的葡萄球菌属物种之一。从葡萄球菌分离株 DAR78870 和对羟基苯甲醛的培养滤液中分离出一种新的具有植物毒性的二吡啶-丁烷-1,4-二醇和一种新的二丙烯酸衍生物，这里命名为斯宾塞毒素 (1) 和斯宾塞酸 (2)。 3) 和 2-(4-羟基苯基) 乙酸 (4)。斯宾塞毒素和斯宾塞酸分别表征为 2,3-二(吡啶-3-基)丁烷-1,4-二醇和 (2Z,2'Z)-3,3'-(羰基双(氧基))二丙烯酸，通过光谱方法（主要是 NMR 和 HRESIMS）。斯宾塞毒素 (1), 当纯化合物在 Vitis lambrusca 和 Vitis vinifera cv. 的葡萄叶上进行测定时，对羟基苯甲醛 (3) 和 2-(4-羟基苯基) 乙酸 (4) 显示出植物毒性。设拉子。