Figure 1

General structures of bidentate 1 and tridentate 2 amide targets, prepared from picolinic acid 3 and pyridine-2,6-dicarboxylic acid 4.

General structures of bidentate 1 and tridentate 2 amide targets, prepared from picolinic acid 3 and pyridine-2,6-dicarboxylic acid 4.