Abstract: These compounds, represented by the formula (I) below, are used by way of agents inducing resistance to cryptogamic diseases in plants capable of being infested by a pathogenic fungus, for example, for the protection of wheat especially with respect to Septoria nodorum, Erysiphe graminis and Gaemannomyces graminis; of capsicum with respect to Phytophthora capsici; of melon with respect to Pseudoperonospora cubensis; of tomato with respect to Phytophthora infestans; and of "Xanthi" tobacco with respect to Phytophthora parasitica var. nicotianae.