G.D. Searle and Co.
Patent: US5760068 A1, 1998 ;

Abdellatif, Khaled R.A.; Chowdhury, Morshed Alam; Dong, Ying; Velazquez, Carlos; Das, Dipankar; Suresh, Mavanur R.; Knaus, Edward E.
Bioorganic and Medicinal Chemistry, 2008 , vol. 16, # 22 p. 9694 - 9698