2-chloro-N-(4-methyl-1,3-thiazol-2-yl)pyridine-3-carboxamide

5-hydroxy-2,2,11-trimethylchromeno[7,6-b][1,8]naphthyridin-6-one

6-hydroxy-3,3,12-trimethylchromeno[5,6-b][1,8]naphthyridin-7-one

6-hydroxy-3,3-dimethyl-3H-pyrano<2',3':7,8>chromeno<2,3-b>pyridin-7-one

6,8-dihydroxychromeno[2,3-b]pyridin-5-one