51842-50-3
4(1H-吲哚-3-基)-2,4-二氧代丁酸乙酯
→
67766-85-2
5-indol-3-ylidene-2H-1,2-oxazole-3-carboxylic acid
67766-84-1
5-indol-3-yl-isoxazole-3-carboxylic acid ethyl ester