Other ; Related Article: Jian-Wei Tang, Wei-Guang Wang, Ao Li, Bing-Chao Yan, Rong Chen, Xiao-Nian Li, Xue Du, Han-Dong Sun, Jian-Xin Pu||Tetrahedron|||doi:10.1016/j.tet.2017.02.019 ; Abstract ; An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.