CJCU
Studies on Bis-Crown Ether (Ⅳ)——Extraction of Alkali Metal Picrates with Schiff-base and Secondary Amine Type Bis-Crown Ethers Containing Benzo 15-Crown-5 Moiety
Wang Defen, Wang Dengjin, Du Henghua, Sun Xiaoqiang, Hu Hongwen
Chem. J. Chinese Universities . 1988, (4): 317 -322 .