Chugai Seiyaku Kabushiki Kaisha
Patent: US4500714 A1, 1985 ;

Ogata, Masaru; Matsumoto, Hiroshi; Shimizu, Sumio; Kida, Shiro; Wada, Toru; et al.
Journal of Medicinal Chemistry, 1986 , vol. 29, # 3 p. 417 - 423