ChemInform Abstract: Phenanthroindolizidine Alkaloids from Tylophora atrofolliculata with Hypoxia‐Inducible Factor‐1 (HIF‐1) Inhibitory Activity. Issue 52 (6th December 2016) - Chen, Cheng‐Yu; Zhu, Guo‐Yuan; Wang, Jing‐Rong; Jiang, Zhi‐Hong