Compounds having plant fungicidal properties are of formula (I) and stereoisomers thereof, wherein R1 and R2, each represent a hydrogen atom, a halogen atom, or an alkyl group containing from 1 to 4 carbon atoms, R3 and R4 each represent a hydrogen or an alkyl group containing from 1 to 4 carbon atoms, R5 and R6 each represent an alkyl group containing from 1 to 4 carbon atoms or R5 and R6 together with the adjacent nitrogen atom from a heterocyclic ring which may optionally contain an additional heteroatom, X and Y each represent a hydrogen atom, a halogen atom, or an alkyl, cycloalkyl, cycloalkylalkyl, alkenyl, alkynyl, aryl, aralkyl, alkoxy, aryloxy or silyl group, n has the value 0 or 1 and Q and Z are bridging groups. |