Pelentanic acid

2,2-bis(2-hydroxy-4-oxochromen-3-yl)acetic acid

2,2-bis(2-hydroxy-4-keto-chromen-3-yl)acetic acid

2,2-bis(2-hydroxy-4-oxo-chromen-3-yl)ethanoic acid

Bis[4-hydroxy-2-oxo-2H-1-benzopyran-3-yl]acetic acid

Bis(2-oxo-4-hydroxy-2H-1-benzopyran-3-yl)acetic acid