参考文献

Yoon, Sung June; Chung, Yong Ho; Lee, Chi Woo; Oh, Yoon Seok; Choi, Dong Rack; Kim, Nam Doo; Lim, Jae Kyung; Jin, Yoon Ho; Lee, Dug Keun; Lee, Won Yong Journal of Heterocyclic Chemistry, 1997, vol. 34, # 3 p. 1021 - 1027 doi: 10.1002/jhet.5570340348