2-oxabicyclo[2.2.1]heptane-1-carboxylic acid, 4,7,7-trimethyl-3-oxo-, 2-[(2-oxo-7-propoxy-2H-1-benzopyran-3-yl)carbonyl]hydrazide;2-Oxo-7-propoxy-N'-[(4,7,7-trimethyl-3-oxo-2-oxabicyclo[2.2.1]hept-1-yl)carbonyl]-2H-chromene-3-carbohydrazide
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