(7-hydroxy-2-oxo-2H-chromen-4-yl)acetic acid N'-(2-(4-hydroxy-2-oxo-2H-chromen-3-yl)-2-oxoethyl)hydrazide
(7-hydroxy-2-oxo-2h-chromen-4-yl)acetic acid n'-(2-(4-hydroxy-2-oxo-2h-chromen-3-yl)-2-oxoethyl)hydrazide