1846-76-0
香豆素-3-羧酸乙酯
+
63-74-1
磺胺
→
111456-11-2
2-oxo-N-(4-sulfamoylphenyl)chromene-3-carboxamide
531-81-7
香豆素-3-羧酸
3757-06-0
2-oxochromene-3-carbonyl chloride