1	NST	3-{[(3-nitroaniline]sulfonyl}thiophene-2-carboxylic acid	1.000
2	STC	3-[(4-chloroanilino)sulfonyl]thiophene-2-carboxylic acid	0.818
3	HTC	3-{[(4-carboxy-2-hydroxyaniline]sulfonyl}thiophene-2-carboxylic acid	0.720