Liu, H. et al. 2015. Synthesis and Crystal Structure of 1,7,8,9-Tetrachloro-N-ethyl-10,10-dimethoxy-4-azatricyclo(5,2,1,02,6)dec-8-ene-3,5-dione. Asian Journal of Chemistry. 28, 2 (Nov. 2015), 295–297. DOI:https://doi.org/10.14233/ajchem.2016.19269.