IC₅₀ Values (μM) for N^α-arylsulfonyl histamine derivatives. 1-DNJ:reference inhibitor.

Type I compounds	IC50 (μM)
I-b	250.00 ± 1.03
I-c	65.08 ± 1.04
I-d	79.50 ± 1.05
I-e	421.6 ± 0.94
I-f	244.2 ± 1.09
I-g	71.43 ± 1.02
I-h	72.69 ± 1.05
I-i	102.20 ± 1.05
I-j	95.55 ± 1.02
1-DNJ	65.18 ± 1.04