The structure of mopérone has been investigated using X-Ray diffractometer intensities in order to compare the molecular conformation with that of other butyrophenones.
Tinant, B., Germain, G., Declercq, J.-P., Van Meerssche, M., Azibi, M., Draguetbrughmans, M., & Bouche, R. (1982). Détermination de la Structure de la Mopérone: Fluoro-4′ (Hydroxy-4 p-Tolyl-4 Pipéridino)-4 Butyrophénone. Societes Chimiques Belges. Bulletin, 91(4), 283-287. https://doi.org/10.1002/bscb.19820910404 (Original work published 1982)