Novel compounds of formula I
wherein R¹ is independently hydrogen, hydroxy, alkyl with 1 to 6 carbon atoms, acyloxy groups with 1 to 6 carbon atoms, alkyloxy with 1 to 6 carbon atoms or from 1 to 5 sugar moities; and R² is independently hydrogen, or alkyl with 1 to 6 carbon atoms.
The compounds are producible by aerobic cultivation on suitable nutrient media under suitable conditions of a strain of the fungus Ascochyta sp., subsequent recovery of the active component from the fermentation medium, and optionally modifying the active compound to obtain a compound of the desired formula I.
Disclosed is also microorganisms capable of producing said compounds, compositions containing said compounds, and the use of such compositions for controlling fungi in valuable crops, animals, including birds and mammals, and in the preservation of wood, paints and edible products.
式 I 的新型化合物
其中 R¹ 独立地为氢、羟基、1 至 6 个碳原子的烷基、1 至 6 个碳原子的酰氧基、1 至 6 个碳原子的烷氧基或 1 至 5 个糖基;R² 独立地为氢或 1 至 6 个碳原子的烷基。
这些化合物可通过在适当的营养
培养基上,在适当的条件下,对真菌 Ascochyta sp.菌株进行有氧培养,随后从发酵
培养基中回收活性成分,并对活性化合物进行选择性修饰,以获得所需的式Ⅰ化合物。
本发明还公开了能够产生上述化合物的微
生物、含有上述化合物的组合物,以及这些组合物在控制有价值的作物、动物(包括鸟类和哺乳动物)中的真菌,以及在木材、涂料和食用产品的防腐中的用途。