Feyen, Fabian, Jürg Gertsch, Markus Wartmann, and Karl-Heinz Altmann. 2007. “Synthesis and Biological Activity of 12-Aza-Epothilones (Azathilones) – Non-Natural Natural Products With Potent Antiproliferative Activity”. CHIMIA 61 (4):143. https://doi.org/10.2533/chimia.2007.143.