Anthelmintic used to control fascioliasis in ruminants. Prepn: NL 6505635; S. Van der Meer et al., US 3662035 (1966, 1972 both to Chemiefarma); S. Van der Meer, H. Pouwels, J. Med. Chem. 12, 534 (1969). Activity: J. Guilhon et al., Bull. Acad. Vet. Fr. 43, 67 (1970). Toxicology: J. M. Poul, M. Dagorn, Recl. Med. Vet. 158, 363 (1982). HPLC determn in plasma: Y. S. Endoh et al., J. Chromatogr. 426, 202 (1988).