The structure and synthesis of dolastatin 3 Pettit, G.R.; Kamano, Y.; Holzapfel, C.W.; Van Zyl, W.J.; Tuinman, A.A.; Herald, C.L.; Baczynskyj, L.; Schmidt, J.M. Journal of the American Chemical Society 109(24): 7581-7582 1987 0002-7863 https://eurekamag.com/research/029/425/029425167.php