The present invention relates to a compound represented by the general formula (1) or its salt, a process for producing the same, and an antifungal agent comprising the same as an effective component: ##STR1## wherein R.sup.1 represents a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group bonded through a carbon atom in the ring to the main chain; R.sup.2 presents a hydrogen atom, a fluorine atom or a substituted or unsubstituted alkyl group; and R.sup.3 represents a cyano group, a thioamido group or a group represented by the formula ##STR2## in which R.sup.4 is a hydroxyl group or a group of the formula ##STR3## (R.sup.7 and R.sup.8, which may be the same or different, are hydrogen atoms or substituted or unsubstituted alkyl, alkenyl, alkynyl, cycloalkyl, aryl, amino, alkoxy, hydroxyl or heterocyclic groups, and may form a substituted or unsubstituted heterocyclic group together with the nitrogen atom to which R.sup.7 and R.sup.8 attach), R.sup.5 is a substituted or unsubstituted alkoxy group or a group of the formula ##STR4## (R.sup.7 and R.sup.8 are as defined above), and R.sup.6 is a hydrogen atom or a substituted or unsubstituted alkyl group.