参考文献

Otsubo, Kenji; Matsubara, Jun; Ohtani, Tadaaki; Kawano, Yoshikazu; Kitano, Kazuyoshi; Morita, Seiji; Kondo, Kazumi; Yamamura, Yoshitaka; Uchida, Minoru Heterocycles, 1996, vol. 43, # 12 p. 2627 - 2642