Janssens, Frans; Torremans, Joseph; Janssen, Marcel; Stokbroekx, Raymond A.; Luyckx, Marcel; Janssen, Paul A. J.
Journal of Medicinal Chemistry, 1985 , vol. 28, # 12 p. 1943 - 1947

Janssen Pharmaceutica N.V.
Patent: US4219559 A1, 1980 ;