1. E. Pastorek, W. Orth, W. Weiss, H.W. Kleffner, Novel separation process. US Patent 5,066,806, Nov. 19, 1991.
2. ] Y.Z. Zhang, J.K. Zhang, W.Y. Ma, T.Z. Gao, Z.Q. Ye, G. Zhao, Compounding method of midbody required in compounding of montelukast sodium. CN Patent 102,617,460, Aug. 1, 2012.
3. Z.G. Song, D.L. Hughes, 7-chloroquinaldine synthesis. US Patent 5,126,456, Jun. 30, 1992.
4. Z.M. Zhang, C.J. Wu, J.R. Zhang, Y.Z. Zuo, Preparation method of midbody 7-chloroquinaldine. CN Patent 101,367,762, Feb. 18, 2009.
5. B. Liu, C.H. Lu, G.H. Xi, Method for preparing 7-chloroquinaldine by use of phase-transfer catalytic reaction. CN Patent 103,524,408, Jan. 22, 2014.