7664-93-9
硫酸
+
51762-79-9
2-(4-ethylphenyl)sulfanylterephthalic acid
→
51762-99-3
7-ethyl-9-oxothioxanthene-3-carboxylic acid
51798-19-7
7-ethyl-9,10,10-trioxothioxanthene-3-carboxylic acid