Serotonin 5-HT2A receptor antagonist. Prepn: A. K. K. Bjrk et al., DE 2941880; eidem, US 4308387 (1980, 1981 both to Ferrosan). LC-MS determn in swine liver: G. Balizs et al., Analyst 119, 2687 (1994). Mechanism of action study: J. T. Haskins et al., Brain Res. Bull. 19, 465 (1987). Anti-aggressive effects in pigs: J. L. Barnett et al., Appl. Anim. Behav. Sci. 50, 121 (1996).