Cheng, Weiming, Rihong Tan, Yongchi Zeng, Wei Huang, and Wenting Zhang. 2012. “Synthesis and Biological Activities of 2-[3-(4-Morpholino)propylthio]-5-(difluromethoxy)benzimidazole Derivatives”. Asian Journal of Chemistry 24 (5):1996-98. https://asianpubs.org/index.php/ajchem/article/view/8938.