Compounds of formula (I), and pharmaceutically acceptable salts thereof, may be used in therapy, for example as antifungal agents, wherein: R1, R2 and R3 are as defined herein. Certain compounds of formula (I) are also provided. Compounds of formula (I), and agriculturally acceptable salts thereof, may also be used as agricultural fungicides.
Tomchin, A. B., Journal of Organic Chemistry USSR (English Translation), 1987, vol. 23, # 6, p. 1180 - 1187