Zhang, Jian-Jian; Yan, Chang-Song; Peng, Yu; Luo, Zhen-Biao; Xu, Xiao-Bo; Wang, Ya-Wen Organic and Biomolecular Chemistry, 2013, vol. 11, # 15 p. 2498 - 2513 doi: 10.1039/c3ob00053b