Fig. 3. Described key 2D in Monoterpene indole alkaloids from Vinca minor L. (Apocynaceae): Identification of new structural scaffold for treatment of Alzheimer's disease

Fig. 3. Described key 2D NMR correlations of revision of previously assigned positions in molecule 17 (COSY interaction – red bond, HMBC interaction – blue arrow). (For interpretation of the references to color in this figure legend, the reader is referred to the Web version of this article.)