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. 2013 Sep 9;110(39):15573–15578. doi: 10.1073/pnas.1310459110

Fig. 1.

Fig. 1.

Synthetic strategy for representative polycyclic indole alkaloids and our synthetic library. (A) Biosynthetic strategy for representative indole alkaloids. (B) Synthetic plan for a polycyclic indoline alkaloid library. Bonds in red are formed in the cyclization phase, and functional groups in blue are installed in the modification phase.