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Tetrahedron Letters, 2009
Volume 50, Issue 29, Pages 4286-4288
Convenient synthesis of various ionic liquids from onium hydroxides and ammonium salts
Yanqing Peng, Guiyun Li, Jianguo Li and Shaojun Yu
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http://dx.doi.org/10.1016/j.tetlet.2009.05.015