Salicylanilide derivative. Prepn: M. A. C. Janssen, V. K. Sipido, BE 839481; eidem, US 4005218 (1976, 1977 both to Janssen). Effectiveness against Taenia pisiformis in rabbits: R. A. F. Chevis et al., Vet. Parasitol. 7, 333 (1980); against Ancylostoma caninum: J. Guerrero et al., J. Parasitol. 68, 616 (1983); against Fasciola hepatica in sheep: B. E. Stromberg et al., ibid. 70, 446 (1984). Prolonged effect on Haemonchus contortus in sheep: C. A. Hall et al., Res. Vet. Sci. 31, 104 (1981). Acts by uncoupling oxidative phosphorylation: H. Van den Bossche et al., Arch. Int. Physiol. Biochim. 87, 851 (1979); H. J. Kane et al., Mol. Biochem. Parasitol. 1, 347 (1980).