Triazinetrione anticoccidial. General prepn: BE 826900; J. H. Reisdorff et al., US 3966725 (1975, 1976 both to Bayer). Prepn and use as animal growth promotant: BE 866389; A. Haberkorn et al., US 4219552 (1978, 1980 both to Bayer). Series of articles on efficacy vs coccidia in chickens: E. Kutzer et al., Wien. Tieraerztl. Monatssch. 72, 321-340 (1985). Field trial in sheep: B. Gjerde, O. Helle, Acta Vet. Scand. 27, 124 (1986); in chickens: H. D. Chapman, J. Comp. Pathol. 97, 21 (1987).