Table 2. Selectivity Index for Inhibition of Isoforms hCA IX and XII over hCA I and II, for Carboxylic Acids 9a–f and 11a,b.

Cmp	I/IX	II/IX	I/XII	II/XII
9a	>63	5	>29	2
9b	36	11	15	5
9c			5	4
9d	20		13
9e	42	47	14	16
9f	37	13	13	5
11a	2		24	10
11b	5	4	10	7