Synthesis and Cytotoxic Activity of Podophyllotoxin Five-Membered N-Heterocyclic Derivatives
Zhu Peifang, Zhao Jingfeng, Yang Xiaodong, Zhang Hongbin
Chin. J. Org. Chem. . 2014, (6): 1167 -1171 .  DOI: 10.6023/cjoc201312029