Fig. 2: Synthetic strategy.

a Previous synthetic routes of the 3,4-dioxygenated 5-hydroxy-4-aryl-quinolin-2(1H)-one containing alkaloids. b Retrosynthesis of (+)-aniduquinolone A (1).

a Previous synthetic routes of the 3,4-dioxygenated 5-hydroxy-4-aryl-quinolin-2(1H)-one containing alkaloids. b Retrosynthesis of (+)-aniduquinolone A (1).