This invention provides fungicidal compositions comprising as an active ingredient a compound having the general formula (I): ##STR1## or a stereoisomer thereof, wherein one of X and Y represents hydrogen and the other represents the group ##STR2## in which R is hydrogen, methyl or ethyl; Z represents hydrogen or an alkyl group containing from one to four carbon atoms; R.sup.1 and R.sup.2, which may be the same or different, represent hydrogen or an alkyl group containing one to four carbon atoms, or R.sup.1 and R.sup.2 together with the adjacent nitrogen atom represent an optionally-substituted heterocyclic ring; and n is 0 or 1.