Total Synthesis of Lankacyclinol Generous financial support for this research was provided by the National Institutes of Health (Award no.: GM41560). Additionally, a National Institutes of Health Minority Predoctoral Fellowship (Award no.: GM18547) to G.S.C. is gratefully acknowledged. We also wish to thank Dr. Tsuneaki Hida and Dr. Yoshio Kozai, Takeda Chemical Ltd. (Japan), for providing us with an authentic sample of lankacyclinol as well as copies of the original (1)H NMR spectrum.