X.-W. Liu, J.-J. Wu, Y.-J. Zhang, G. Li, L. Wang, and X.-Y. Dong, “Synthesis and Crystal Structure of 6-Ethoxy-4’,6’-dibromo-2,2’-[ethylenedioxybis(nitrilomethylidyne)]diphenol”, ajc, vol. 25, no. 9, pp. 5039–5041, Apr. 2013.