US4477389 A1, ;

Journal of the American Chemical Society, , vol. 71, p. 743

Journal of the American Chemical Society, , vol. 68, p. 673

Tietz, Helmut; Schwetlick, Klaus
Zeitschrift fuer Chemie (Stuttgart, Germany), 1985 , vol. 25, # 4 p. 149 - 150

Heterocycles, , vol. 86, # 2 p. 1449 - 1463

Zhurnal Obshchei Khimii, , vol. 24, p. 174,177;engl.Ausg.S.177,179

McNary; Magid
Journal of the American Chemical Society, 1946 , vol. 68, p. 673

McNary; Magid
Journal of the American Chemical Society, 1946 , vol. 68, p. 673

Takami, Atsuya; Iwakubo, Masayuki; Okada, Yuji; Kawata, Takehisa; Odai, Hideharu; Takahashi, Nobuaki; Shindo, Kazutoshi; Kimura, Kaname; Tagami, Yoshimichi; Miyake, Mika; Fukushima, Kayoko; Inagaki, Masaki; Amano, Mutsuki; Kaibuchi, Kozo; Iijima, Hiroshi
Bioorganic and Medicinal Chemistry, 2004 , vol. 12, # 9 p. 2115 - 2137