PYRAZOLOPYRIMIDIN-7-ONE AZO DYE AND THERMAL TRANSFER DYE DONATING MATERIAL USING IT

PROBLEM TO BE SOLVED: To provide a dye which has excellent hue and has high fastness proper ties to light and heat, and a thermal transfer dye donating material using the dye. SOLUTION: The dye is represented by formula (I) (wherein R1 is a 1-6C alkyl group or a 6-12C aryl group; R2 and R3 are each...

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