Tags: melting point of 4-ethyl-2-oxo-2H-chromene-3-carboxylic acid | boiling point of 4-ethyl-2-oxo-2H-chromene-3-carboxylic acid | density of 4-ethyl-2-oxo-2H-chromene-3-carboxylic acid | refractive index of 4-ethyl-2-oxo-2H-chromene-3-carboxylic acid
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