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The measured value and theoretical calculation value (m/z 0.00113) are within the error range, and the structure of the target compound H6 was further confirmed Taking Y5 as an example, in the 1 H NMR spectrum, the single peak at 12.73 is attributed to the presence of H at the -NH position, the double peaks at 7.98 are attributed to the presence of H at positions 2 and 6 on the amide-benzene ring, the multiple peaks at 7.34 are attributed to the presence of H at positions 3, 5 on the amide-benzene ring, and at positions 7 and 9 on the coumarin ring, and the single peak at 2.38 is attributed to the presence of H on the -CH 3 position
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