The present invention relates to compounds of formula (I) wherein substituents are as defined in the claims. The invention also relates to methods of using the compounds of formula I to control or prevent infestation of plants, propagation material thereof, harvested crops or non-living materials by phytopathogenic or spoilage microorganisms or organisms potentially harmful to man.本發明涉及具有式(I)之化合物其中取代基係如在申請專利範圍中所定義。本發明還涉及使用具有式I之化合物以控制或防止植物、其繁殖材料、收穫的作物或非生命材料被植物病原的或腐敗的微生物或對人潛在有害的有機體侵染之方法。