The invention relates to compounds of formula Iwherein R1, R2, X, Y1, Y2, Y3, D1, D2, D3, G1, G2, G3 and p are as defined in the claims. The invention further provides intermediates used in the preparation of these compounds, to compositions which comprise these compounds and to their use in agriculture or horticulture for controlling or preventing infestation of plants by phytopathogenic microorganisms, preferably fungi.